 |
|
|
|
|
|
|
|
|
Four consecutive positive integers |
2019-03-12 |
|
From Nabila:
The product of four consecutive positive integers in 24024
What is their sum?
Answered by Penny Nom. |
|
|
|
|
|
|
A circle with a circular hole |
2019-03-11 |
|
From Sue:
My little one is wondering if a circle with a circular hole could be described as an irregular semicircle.
As it has 2 sides but is not the standard shape. Could you share your thoughts ??
Answered by Penny Nom. |
|
|
|
|
|
|
Converting a base six number to base three |
2019-03-10 |
|
From Nina:
Change 253 in base 6 to a number in base 3
Answered by Penny Nom. |
|
|
|
|
|
|
A parabolic curve on a bridge |
2019-03-09 |
|
From monica:
how do i fint the formula for my parabola with the provided information:
the golden gate bridge has a parabola
(343,160) = coordinate
(0,0)= vertex
Answered by Penny Nom. |
|
|
|
|
|
|
A triangle of maximum area |
2019-03-07 |
|
From Tom:
Triangle ABC is such that AB=3cm and AC=4cm.
What is the maximum possible area of triangle ABC?
Answered by Penny Nom. |
|
|
|
|
|
|
Misuse of greater than |
2019-03-07 |
|
From Kenneth:
I have an old business mathematics textbook. The authors have indicated that the following expressions indicate multiplication:
? is 2/3 greater than 90; ? is 2/3 smaller than 90. They also indicated that the following expression would indicate division: 30 is 2/3 greater than ? and 30 is 2/3 smaller than ?.
How can these phrases indicate multiplication and division? How can 60 be 2/3 greater than 90 and also smaller than 90 as indicated above. What were the authors thinking? I have added the page from the book that indicates what I have explained in my message
Kenneth
Answered by Harley Weston. |
|
|
|
|
|
|
Random assignments |
2019-03-02 |
|
From Ninoshka:
Liu and Michi plan to sign up for a drawing class next term.
Drawing is offered during the first 4 periods of the day, and students are assigned randomly to class.
What is the probability that Liu and Michi will have drawing together?
Answered by Penny Nom. |
|
|
|
|
|
|
3 months loss and then a profit |
2019-03-02 |
|
From Ida:
Let say, I have 10k of capital and I ran business for 4 months.
The first months i loss 50%, the second month i loss 50% and so do the third month.
The fourth month my profit is 50%
So can I calculate the balance of money that i have out of my capital?
Answered by Penny Nom. |
|
|
|
|
|
|
Double the number of pennies each week |
2019-02-28 |
|
From Donald:
If I save a penny a week,double it every week,How many weeks will it take to reach 1,000,000 dollars
Answered by Penny Nom. |
|
|
|
|
|
|
The top half of a cone |
2019-02-27 |
|
From danica:
What portion of the height from top that the cone be cut into two equal volume?
Answered by Penny Nom. |
|
|
|
|
|
|
4 digit codes |
2019-02-27 |
|
From Sophia:
How many 4 digit codes can you get out of a numbered key pad ?
Answered by Penny Nom. |
|
|
|
|
|
|
A quadratic equation problem |
2019-02-26 |
|
From Em:
One root of the equation
2x^2 + bx - 24 = 0 is -8. What
are the possible values of b and
the other root?
Answered by Penny Nom. |
|
|
|
|
|
|
f(x + 2) |
2019-02-26 |
|
From a student:
How do you use f(x) = 3x+1 to determine the transformed function of f(x + 2)?
Answered by Penny Nom. |
|
|
|
|
|
|
Weighing stars and hearts |
2019-02-25 |
|
From Zach:
Two stars and one heart weigh 38 units. One star and one heart weigh 27 units what is the weight of each?
Answered by Penny Nom. |
|
|
|
|
|
|
Running around a circular track in opposite directions |
2019-02-24 |
|
From carmi:
how many times will lita and rose pass each other in 15 minutes if lita and rose start jogging on a 110 meters circular track. they begin at the same point but in opposite direction. lita at 8/3 meters per second and rose at 7/3 meters per second.
Answered by Penny Nom. |
|
|
