109 items are filed under this topic.
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The product of 3 integers is -24 |
2019-11-06 |
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From Rick:
This is a question on my sons pre-ap practice quiz.
I think that there is information missing (?)
The product of 3 integers is -24
The sum of 3 integers is -12
What are the 3 integers ?
This is exactly how it was written on his quiz paper.
I have wasted to much time on the internet, trying to find a
formula(s) to help him.
Please help me.
Answered by Penny Nom. |
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The divisors (aliquot parts) of a positive integer |
2019-10-31 |
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From Kenneth:
Is there a fast and simple method that can be used to determine the aliquot parts, whole, positive numbers that can divide into another whole, positive number?
Answered by Harley Weston. |
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Four odd factors |
2018-07-04 |
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From Manchali:
Find a number that has 4 factors and all of them are odd numbers.
Answered by Penny Nom. |
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Multiplies and factors |
2018-02-24 |
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From Lil:
Is a multiple the same as a factor?
Answered by Penny Nom. |
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A question about perfect squares |
2018-02-04 |
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From Jolyn:
Find the smallest possible value of a whole number m if 648x m is a perfect square
Answered by Penny Nom. |
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Factors |
2017-08-16 |
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From Gemma:
Why do 315 and 525 have the same number of factors?
Answered by Penny Nom. |
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The product of a 2-digit number and a 3-digit number |
2015-02-06 |
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From Nathaniel:
The product of a 2-digit number and a 3-digit number is about 50 000 what are the products
Answered by Penny Nom. |
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Prime factorization in exponent form |
2014-10-31 |
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From Emma:
I need to find out how to make a prime factorization of 120 in exponential form.
Answered by Penny Nom. |
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Sieve of Eratosthenes |
2014-10-03 |
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From Hope:
using Sieve of Eratosthenes to determine for in instance prime numbers between 1 to 200, to what nth number should i stop?, 4th, which is 11 or what?
Answered by Robert Dawson. |
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Factor strings |
2013-10-14 |
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From Jane:
What's a factor string? I'm confusey in the head.
Answered by Penny Nom. |
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Factoring |
2012-04-26 |
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From Amanda:
y=x^2-9x
Answered by Penny Nom. |
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A number puzzle |
2012-04-07 |
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From Kenya:
my number is less than 25
my number of tiles will make only one rectangle
my number is odd
my number is a factor of 36
Answered by Penny Nom. |
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Simplify the expression |
2012-02-12 |
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From Christy:
Hi guys, ok so I'm having problems with solving this equation since it's been so long I've done precal.
I have to find critical points so I have to find the derivative first. This is what I've done so far
s(t)= (t-6)^4 * (t+1)^2
t'= 4(t-6)^3*(1)*(t+1)^2+ 2(t+1)(1)*(t-6)^4
so this is where I got stuck, which is the algebra part. How can I simplify this to get the answer to figure out the critical points.
Answered by Penny Nom. |
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Rectangular arrays |
2010-09-29 |
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From Kim:
My 4th grader has started working on rectangular array that shows 2 factors of a number.
The problem reads on centimeter grid paper draw as many arrays as you can for each of the #'s 2,3,4, 5,6,7,,11,12,15 and 16. That would be great except I have no idea what they are talking about and I cannot offer any help to my daughter.
Answered by Penny Nom. |
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Adding five positive integers that have a product of 48 |
2010-04-27 |
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From Lorraine:
What is the smallest possible sum that can be obtained by adding five positive integers that have a product of 48.
Answered by Chris Fisher. |
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Factors and zeros of a polynoial |
2010-03-17 |
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From Susan:
find a polynomial function of degree three with -3 as a zero of multiplicity 2 and 4 as a zero of multiplicity 1.
Answered by Tyler Wood. |
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Factors |
2009-10-30 |
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From brenden:
The numbers 3,5,7 are factors of n. Find four other factors of n besides 1
Answered by Penny Nom. |
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An array |
2009-10-28 |
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From felicia:
what factors are shown in the array below?
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Answered by Penny Nom. |
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Find a polynomial function with the indicated zeros and satisfying the given conditions |
2009-03-23 |
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From Kristen:
Find a polynomial function with the indicated zeros and satisfying the given conditions. Simplofy your answer (no imaginary numbers or parentheses in the answer)
Zeros: 1+2i, 1-2i, 5 ; f(-2)=1
Answered by Harley Weston. |
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Surface area and scale factors |
2009-02-21 |
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From tina:
the surface area of a sphere is about 86 ft (2) find the surface area of a larger sphere that has a scale factor of 4
Answered by Penny Nom. |
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How many students were there |
2009-01-25 |
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From sooos:
After a math lecture in university, the students go to the cafeteria. EACH ONE of them buys a cheese sandwich and a cup of tea. They ALL pay $18.49. How many students were they?
Answered by Chris Fisher. |
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The factors of an integer |
2009-01-06 |
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From Madison:
what are the factors of 878
Answered by Robert Dawson. |
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Do all square numbers have an odd number or factors? |
2008-12-11 |
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From Amy:
Do all square numbers have an odd number or factors?
Answered by Victoria West. |
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Factor 9x^2 + 6x + 4 |
2008-11-21 |
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From Jonah:
how can i solve this by factoring: 9x^2 + 6x + 4
Answered by Harley Weston. |
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Number of factors |
2008-09-18 |
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From Austin:
I am stuck on finding what type of number has exactly two factors and
what type of number has an odd number of factors? I need some examples.
Answered by Penny Nom. |
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Number of factors |
2008-07-20 |
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From pete:
how do you find the number of factors in a really big number without using a factoring program or listing the out?
Answered by Penny Nom. |
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What is the largest perfect square factor of 1512? |
2008-07-02 |
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From peter:
What is the largest perfect square factor of 1512?
Answered by Penny Nom. |
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How many positive integer factors of 2^2*3^2*5 are multiples of 12? |
2008-06-27 |
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From Peter:
How many positive integer factors of 2^2*3^2*5 are multiples of 12
Answered by Janice Cotcher. |
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Scale factor |
2008-05-28 |
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From Riley:
I have a math problem, and a big test coming up on Friday or Thursday (my teacher hasn't decided yet.) I need help understanding how
I would do this problem. Here it is: they wanted me to find the perimeter and area of a rectangle when they only give me the scale factor. I've
delt with scale factors before, but this is quite confusing. I have done the scale factor way by having a rectangle that maybe has a width of 10 and a
height of 20, and I needed to find what the scale factor would be for a rectangle with the width of 5 and a height of 10. I know that they scale factor
would be 2, right? But this just gives me the scale factor, and I have to FIND the perimeter and area. Hopefully you can get back to me tonight.
Answered by Harley Weston. |
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Prime factors |
2008-05-21 |
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From john:
the first 5 prime numbers are 2,3,5,7,11. which is the smallest number that has these prime factors.
Answered by Stephen La Rocque. |
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The number of positive integer factors |
2008-04-02 |
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From lisa:
If n is a positive integer such that 5n has 36 positive factors, and 3n has 40 positive factors:
How many positive factors can 15n have? How many values are possible for n?
Answered by Penny Nom. |
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Scale factors |
2008-02-13 |
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From Dayne:
My teacher doesn't now how to teach us scale factors and i have a problem to make it easier to understand. The problem is: A map of Levi's property is being made with a scale of 2 cm : 3 meters. What is the scale factor?
Answered by Stephen La Rocque. |
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(303,000,000,000,303x3,300,000,033)/1,000,100,010,001 |
2008-01-13 |
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From Adrian:
Give the result of the following computation as an integer.
(303,000,000,000,303x3,300,000,033)/1,000,100,010,001
N.B. No calculators allowed
Answered by Penny Nom. |
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13 year and 17 year locusts |
2007-10-12 |
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From stefan:
how many years pass between the years when both 13 year and 17 year locusts are out at the same time?
Answered by Penny Nom. |
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What is a friendly Factor? |
2007-10-12 |
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From Christine:
Hi mi niece and I are trying to figure out what friendly factors are. An example of one of the questions: Use friendly factors to multiply the following. 8x25=.
Can you please help? thank you
Answered by Penny Nom. |
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What are the factors of 111? |
2007-09-13 |
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From Miska:
What are the factors of 111?
Answered by Penny Nom. |
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The factors of 35 |
2007-09-11 |
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From johh:
wats the factors for 35
Answered by Penny Nom. |
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Find All 24 Factors Of 360 |
2007-09-08 |
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From Jennifer:
Find All 24 Factors Of 360
Answered by Penny Nom. |
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Prime factors in exponential form |
2007-09-06 |
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From Michelle:
how would you write this: factor 48 as a product of primes written in exponential form
Answered by Stephen La Rocque. |
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Common factors |
2007-08-19 |
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From John:
I have problem factorising 2p^3 - 34p. Please advise me.
Answered by Leeanne Boehm, Steve La Rocque and Penny Nom. |
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An odd number with 12 factors |
2007-06-27 |
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From Wilson:
Do you know of any odd number that has 12 factors? Reply back today.
Because I have hand in a project tomorrow.
Answered by Stephen La Rocque and Harley Weston. |
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Factor X^6 - 64 |
2007-06-20 |
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From Krystal:
How do I Factor X^6 - 64 into linear factors?
Answered by Penny Nom. |
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If the product of A,B,C is 15834, what is A+B+C? |
2007-03-10 |
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From rachel:
if the product of A,B,C is 15834, what is A+B+C?
Answered by Penny Nom. |
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Factors |
2006-11-22 |
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From Jacqueline:
Why do the numbers 16,36,48,60,64,90 and 100 have an odd number of factors?
Answered by Stephen La Rocque and Penny Nom. |
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How do I factor 10x^2 + 17x + 6? |
2006-11-21 |
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From Sheldon:
How do I factor 10x^2 + 17x + 6?
Answered by Penny Nom. |
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Scale factors and ratios |
2006-11-19 |
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From Maggie:
I have a BIG math test coming up, and it's about scale factors and ratios, but i don't understand them at all. How can you tell the difference between scale factors and ratios? and How are they used in the everyday world?
Answered by Penny Nom. |
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The sum of two numbers is 30 |
2006-11-03 |
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From GG:
The sum of two numbers is 30 and the product of the same two numbers is 221. Find the two numbers.
Answered by Stephen La Rocque. |
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An odd number of factors |
2006-10-28 |
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From Anthony:
What is the common name used for numbers that have an odd number of factors? This answer should be a two word answer only.
Answered by Stephen La Rocque. |
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Find the divisors |
2006-08-21 |
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From Minh:
Using combination or permutation or both, find the
a. Divisors
b.even divisors
of 2160
Answered by Stephen La Rocque and Penny Nom. |
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When 391758 and 394915 are divided by a certain three digit number, ... |
2006-07-26 |
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From Nick:
When 391758 and 394915 are divided by a certain three digit number, the three digit reminder is the same in each case. Find the divisor.
Answered by Chris Fisher and Steve La Rocque. |
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x^2+2x-3 is a factor f(x)=x^4+2x^3-7x^2+ax+b |
2006-04-06 |
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From Maha:
Given that x2+2x-3 is a factor f(x)=x4+2x3-7x2+ax+b, find a and b and hence factor f(x) completely.
Answered by Penny Nom. |
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Factors of a cubic |
2006-03-08 |
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From Skye:
Show that (x+2) is a factor of f(x) where:
f(x) = px3 + (4p+2)x2 + (5p+4)x + 2p
Find the range of values for which the equation f(x) = 0 has 3 distinct real roots
Answered by Penny Nom. |
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X^2 + 4X + 6 is a factor of X^4 + rX^2 + s |
2006-02-11 |
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From Katie:
If X2 + 4X + 6 is a factor of X4 + rX2 + s, then find the value of r+s?
Answered by Steve La Rocque and Penny Nom. |
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How many divisors does the number 138600 have? |
2006-02-08 |
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From Joe:
How many divisors does the number 138600 have?
Answered by Steve La Rocque and Penny Nom. |
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LCM |
2005-12-12 |
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From Alex:
what is the LCM of 210 and 54 and the LCM of 42 and 126
Answered by Penny Nom. |
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Numbers with exactly 5 divisors |
2005-11-23 |
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From Mary Lou:
Show the 10 numbers with exactly 5 divisors.
Answered by Penny Nom. |
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Factoring |
2005-10-30 |
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From A student:
Factor 18x3 y3 + 12xy2
Answered by Penny Nom. |
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Divisibility by each of the first ten counting numbers |
2005-10-17 |
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From Simon:
determine smallest positive integer that is divisible by each of the first ten counting numbers
Answered by Penny Nom. |
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An odd number of factors |
2005-10-06 |
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From Ramneek:
What is the common name used for numbers that have an odd number of factors?
Answered by Claude Tardif. |
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A 3-digit product |
2005-02-25 |
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From A student:
I have an odd 3- digit product. My factors are a 1 digit number and either a 2 or 3 digit number. My factors are odd, but neither is 1. Find my factors and my product.
Answered by Penny Nom. |
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Factoring a cubic |
2005-02-20 |
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From Abraham:
How would you factor completely,
x3-x2+5x-5?
Answered by Claude Tardif. |
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252 x ? is a cube |
2004-12-22 |
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From Andrea:
What is the smallest positive interger by which 252 can be multipled so the result is a perfect cubed?
Answered by Penny Nom. |
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Crossword math puzzle |
2004-09-14 |
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From Joyce and Tiffany:
The puzzle name was real number vocabulary and the question is (a number that divides evenly into another what is it?). (Space in between tic-marks on a number line).
Answered by Harley Weston. |
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an integer with three factors |
2004-08-03 |
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From A student:
What is the probability that a randomly chosen 3 digit number has exactly 3 factors
Answered by Penny Nom. |
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Factoring |
2004-07-28 |
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From Nicole:
Can 4x2 + 19x + 12 be factored? i have tried but i cannot figure it out. Is there a way to find out if it cannot be factored before i try to work out the problem?
Answered by Penny Nom. |
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What is a number that has exactly 13 factors? |
2003-11-09 |
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From Mary:
What is a number that has exactly 13 factors?
Answered by Penny Nom. |
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Which one has the most factors? |
2003-10-31 |
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From Kristi:
Of all the whole numbers less than or equal to 5000, which one has the most factors?
Answered by Claude Tardif. |
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Pairs of prime numbers |
2003-10-13 |
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From Nikolas:
Use pairs of prime numbers to find all the numbers less than 50 that have only two prime factors. Make an organized list.
Answered by Penny Nom. |
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Relatively prime |
2003-09-27 |
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From James:
what is the definition a relative prime numbers?
Answered by Penny Nom. |
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Making a square |
2003-09-07 |
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From A student:
if I am given any number (say 80 for example), how may I determine the smallest whole number integer which when multipled by it will yield a square number ? In other words if I express this as: 80İ*İnİ=İsquareİnumber, what is the least value of n which will yield a square.
Answered by Penny Nom. |
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An array of pennies |
2003-05-23 |
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From Saundra:
If you have 100 pennies and you are suppose to make an array do you arrange the pennies by date?
Answered by Penny Nom. |
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1575 |
2003-03-13 |
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From Sharyn:
find 6 integers that when multiplied with each other equal +1575 and when the same integers are added together equal zero. there are more positives than negatives and one of the numbers is a double digit between 10 and 20
Answered by Penny Nom. |
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X times Y equals ten million |
2003-02-26 |
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From Baneen:
Would you be able to tell me which two numbers would compute ten million without any number having zeros in it?
Answered by Penny Nom. |
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Factoring |
2003-02-04 |
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From Marcin:
I am having a really hard time with the factor theorem. Can you please help me with the following? (a'3 means a to the exponent 3)
a)8a'3+64b'3c'6
b)8x'4-12x'3-44x'2+24x
c)x'4-21x'2-100
Answered by Penny Nom. |
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Factoring |
2002-12-11 |
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From Larry:
Question:
how do u factor trinonmials
EX: X 3 + Y 3
X 3 - 8Y 3
8X 2 - 72
64A 3 - 125B 6
Answered by Penny Nom. |
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Composites, primes, factors and common factors |
2002-11-20 |
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From Connie:
My son can't remember what a composite number is, what a prime number is and the explaination of factors and common factors. Help!
Answered by Penny Nom. |
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Two problems |
2002-10-14 |
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From Eva:
a) How many different equivalence relations can be defined on the set X={a,b,c,d}? b)Show that 6 divides the product of any 3 consecutive integers. I know it is true that 6 divides the product of any 3 consecutive integers. However, i have problem showing the proof.
Answered by Leeanne Boehm and Penny Nom. |
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A polynomial |
2002-04-14 |
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From A student:
A polynomial function is described by the following conditions: f(x) has two real zeros at x= -2 and x= 1, each of multiplicity 2 f(x) has two complex zeros as x goes to -infinity, f(x) goes to +infinity as x goes to +infinity, f(x) goes to +infinity f(x) has a y-intercept at (0,2) Sketch a polynomial function that satisfies the above conditions. Write an equation for function f(x) Write another function g(x) that also satisfies the above parameters.
Answered by Penny Nom. |
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24x^4 + 3x |
2002-03-18 |
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From gary:
24x 4 + 3x
Answered by Penny Nom. |
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4x(2x-1)+(2x-1)2 |
2001-09-17 |
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From Nick:
how do u solve 4x(2x-1)+(2x-1)2
Answered by Penny Nom. |
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A factoring problem |
2001-06-14 |
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From A student:
What is the factoring of x squared -7+6 equal
Answered by Penny Nom. |
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Primes and square roots |
2001-06-14 |
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From Paul:
I have a bit of a math problem. It has to do with determining if a very large number is a prime. One method entails dividing the number by every smaller prime number. If any divide into it, it's not a prime. This would be a big job if the number was something like 400 digits long. Another way I read about was to take the square root of the number and test all the primes less than its square root. The explanation went like this: "When a number is divided by another number that is greater than its square root, the result is a number smaller than the square root. For example, the square root of 36 is 6. Dividing 36 by 2, a smaller number than 6, gives 18, a number that is larger than the square root. To prove that 37 is prime it is only necessary to divide it by primes less than 6, since if it had a prime factor greater than 6, it would have to have one less than 6 as well." I understand the explanation, up to the last sentence. I fail to see the underlying logic. Why if a prime factor exists below the square does one have to exist above the square too? The number 40 can be divided by the prime 2, a number below its square root, but no other primes can do this above its square root. Have I missed something? What's the logic here?
Answered by Claude Tardif and Penny Nom. |
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25 y^2 + 20 y z - 4 z^2 |
2001-05-15 |
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From Kimmy:
i don't know how to factor the trinomial 25y2 + 20yz - 4z2. I can get it, but i get messed up on getting the minus 4 at the end. all i get is a plus 4. Can it even be factored.
Answered by Penny Nom. |
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Factoring |
2001-03-22 |
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From Kaleena:
Factor this equation: 5x7-10x5+4x3-8x
Answered by Harley Weston. |
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What number from 1 to 25 has the most factors? |
2001-01-23 |
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From John:
What number from 1 to 25 has the most factors?
Answered by Penny Nom. |
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Prime factorization |
2000-12-13 |
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From A student:
What is the prime factorization for 250 1296 and 2400
Answered by Penny Nom. |
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Factoring a cubic |
2000-10-31 |
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From A student:
Factor Completely 18p3 - 51p2 - 135p
Answered by Paul Betts and Penny Nom. |
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A zip code problem |
2000-10-26 |
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From Rob Mathis:
Find the zip code of a place in a county so that the product of it and the zip code of another place in another county of the same name, but in a different state, is an exact multiple of the number 123456789
Answered by Claude Tardif. |
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1234567890 |
2000-09-14 |
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From Bradley Kloetzly:
Can you find two whole numbers, with the smallest possible difference between them, which when multipled together equal: 1234567890?
Answered by Harley Weston. |
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Roots of x^2 + 22 x + 112 |
2000-09-07 |
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From Brian R.:
I need to find the root of the quadratic equation of a square. The problem is x2 + 22x + 112 = 0.
Answered by Penny Nom. |
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How many zeros? |
2000-04-09 |
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From Greg Potts:
The natural numbers 1 to 25 are multiplied together (1 x 2 x 3x..24 x 25). How many zeros are there in the product of this multiplication?
a)6 b)7 c)5 d)10 or e)4?
Answered by Harley Weston. |
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Division |
2000-03-16 |
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From Charday:
What is the easiest way to calculate the least number that can be divided evenly by all the numbers from 1 to 10.
Answered by Penny Nom. |
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10 000 000 = a x b |
2000-03-06 |
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From Spencer Jaffe:
What two numbers that don't end in zero, multiplied equal 10,000,000.
Answered by Claude tardif. |
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Factoring, primes, GCF and LCM |
2000-02-27 |
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From Ruth Kroek:
My son is in grade seven, he has to do a Factoring Booklet the areas covered are: - Prime #'s
- Composite #'s
- Rainbow Factoring
- Finding Multiples (consecutive multiples)
- Finding GCF of 2-3 numbers uning Rainbow factoring
- Finding LCM of 2 numbers using consecutive multiples
- prime factor trees
- prime factor ladders
- finding GCF of 2 numbers using Prime number Method
Although his text 'Math Power' gives some information, we are at a loss ..
Answered by Penny Nom. |
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Three factors |
2000-02-21 |
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From A parent:
Question from a parent helping a child, grade 4, with homework. Can a number have three factors? Name three numbers that have three factors.
Answered by Penny Nom. |
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Factors |
2000-02-15 |
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From Guy Rayfield:
Please can you tell me the factors of 6 I think the answer is 2 and 3 - am I right?
Answered by Penny Nom. |
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Factors |
2000-01-27 |
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From Pam:
My son [age 9, 4th grade] has a math problem with factors. I need to know how to do the problem that involves the factor 24. I'm not even sure where to start.
Answered by Harley Weston. |
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Factoring by graphing |
2000-01-11 |
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From Dylan Kirkwood:
How can you factor a quadratic equation by graphing it?
Answered by Penny Nom. |
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Two algebra problems |
1999-12-17 |
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From Michael Standfest:
If x+4 is a factor of 2x4+kx3-3kx2+6x-40, find k and Prove that n2-n is even for all n, using the proof of contradiction
Answered by Penny Nom. |
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order 4+ determinants |
1999-12-06 |
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From Joe Kron:
Why is it never shown how to calculate the value of 4x4 (or larger size) deteminants by the diagonal multiply methods that are generally shown for 2x2 and 3x3 determinants? The method I'm talking about is called Cramer's Rule??? Is this method not extensible to order 4+ and if not why not? Anyway the method always shown for order 4+ is called "reduction by minors" which is not the answer to this question.
Answered by Walter Whiteley. |
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An odd number of factors |
1999-10-22 |
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From Melissa:
What is the common name used for numbers that have an odd number of factors? What is the least positive integer that has exactly 13 factors?
Answered by Penny Nom. |
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Common factors |
1999-10-06 |
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From Tommygirl98:
Ok I have a question about common factoring I'm not to sure if you could help me but it's worth a try here it goes. Ok I have a test on Friday and i'm having trouble understanding how to do it here's an example, Factor,
-10 + 2b how do you do it and what do they mean by factor?
Answered by Penny Nom. |
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Composite Numbers |
1998-10-07 |
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From Greg Murphy:
What type of composite number has an odd number of factors?
Answered by Harley Weston. |
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Students and Lockers |
1998-10-02 |
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From Mike:
There is a row of 1000 lockers.
There is a line of 1000 students. Student number 1 starts at the first locker and opens all 1000. Student number 2 starts at the second locker and closes every other one. Student number 3 starts at the third locker and goes to every third one, closing the open ones and opening the closed ones. Student number 4 does the same with every fourth locker and so on down the line... After all 1000 students have gone how many lockers are open and which ones are they? Please help! There is proboly a simple solution but we couldnt figure it out for the life of us. Please let us know how you solve it.
Answered by Patrick Maidorn and Penny Nom. |
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Five Factors |
1998-09-19 |
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From Derek Yau:
To whom it may concern, I have difficulty in getting the solution to the following question: Find 5 numbers that have exactly 5 factors. I got 16, 81 but couldn't find the rest. I believe that in order to have 5 factors, it has to be a square number. Isn't it true? I guess there may be a pattern to this. Thanks for your help.
Derek Yau.
Answered by Penny Nom. |
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3 to the power of 1994 |
1998-09-05 |
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From Kim Tangney:
What are the last two digits of: - 3 to the power of 1994
- 7 to the power of 1994
- 3 to the power of 1994 + 7 to the power of 1994
- 7 to the power of 1994 - 3 to the power of 1994
Answered by Penny Nom. |
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Divisors of 6n |
1998-01-26 |
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From James:
If n is a positive integer such that 2n has 28 positive divisors and 3n has 30 positive divisors, then how many positive divisors does 6n have?
(a) 32 (b) 34 (c) 35 (d) 36 (e) 38
Answered by Penny Nom and Haragauri Gupta. |
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Term definitions |
1996-09-18 |
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From M. Seltzer:
A 7th grade algebra student would like the definition of the terms proper factor and perfect number.
Answered by The Centralizer. |
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Number of factors |
1996-01-30 |
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From Chrissy:
What number has exactly 13 positive factors?
Answered by Penny Nom. |
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