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The square root of (18*n*34) |
2008-07-01 |
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From Peter:
What is the least possible positive integer-value of n such that square root(18*n*34) is an integer?
Answered by Penny Nom. |
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Some phone numbers |
2008-06-30 |
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From star:
What do you think the probability of finding the last 3 digits of a telephone number if the 1st digit begins with 7?
Answered by Janice Cotcher and Harley Weston. |
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A rectangular room |
2008-06-30 |
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From Peter:
A rectangular room has a perimeter of 42 feet and an area of 108 square feet. What is the length, in feet, of the shorter side?
Answered by Penny Nom. |
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Remainders |
2008-06-30 |
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From vivek:
what is the remainder when 2050*2071*2095 is divided by 23 ?
this question needs to be done in as less time as possible.
Answered by Penny Nom. |
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A five-sided coin |
2008-06-29 |
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From carla:
A new five-sided coin is to be made in the shape of figure 8.6
The point A on the circumference of the coin is the centre of arc CD, which has a radius of 2cm
Similarly B is the centre of arc DE, and so on.
Find the area of one face of the coin.
Answered by Harley Weston. |
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The size of a pipe |
2008-06-29 |
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From payal:
hi , i want to know the area of a pipe with 63.5 mm diameter and 3718 mm height . can u pls help me
Answered by Harley Weston. |
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A concrete spectator area |
2008-06-29 |
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From Paige:
an area of the school courts is 58.5m x 60.4m,
The spectator area is to be 2m wide and the concrete has to be 10cm deep
Please can you calculate the volume of concrete needs for the spectator area?
Answered by Penny Nom. |
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Percentage increase |
2008-06-29 |
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From Paul:
Could you please help me with this question. I was paying $98.00 a month for my health insurance premium, now it is up to $125.83 How much of an increase is that as a percentage increase, and how can I do this on a calculator. I'd like to know how much my increase is as a percentage.
Answered by Penny Nom. |
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Fish in a pond |
2008-06-28 |
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From Peter:
At the beginning of a study 24 fish are caught, tagged, and released back into a large pond containing fish. A few days later, 19 fish are caught from the pond and three of them have tags. Using this ratio, how many total fish would you expect to be living in the pond?
The answer is 152. Why is that?
Answered by Leeanne Boehm. |
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Differentiate y= (x^x^x)^x |
2008-06-27 |
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From emril:
Differentiate y= (x^x^x)^x
Answered by Harley Weston. |
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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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The area of a 5-point star |
2008-06-27 |
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From rebecca:
Hello,
For a maths extension program i've been given the challenge of finding the area of a 5-point star with each of the 10 outside edges being a length of 1.23cm
How might I go about finding the area for such a shape given only this piece of information?
Sincerely, Rebecca
Answered by Janice Cotcher. |
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4 by 4 determinants |
2008-06-27 |
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From rav:
How to solve problems of determinants which has four rows and four columns& please give me easy tips to solve permutations and combinations problems.
Answered by Harley Weston. |
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Write log_2 (1/8) = -3 in exponential form |
2008-06-27 |
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From Jaime:
how do you write log2 (1/8) = -3 in exponential form?
the 1/8 is a fraction and the 2 is a base of 2
Answered by Penny Nom. |
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How many handshakes take place? |
2008-06-26 |
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From Peter:
Eight people of different heights are at a party. Each person decides to only shake hands with people shorter than him/herself. How many handshakes take place?
My math book says it is 0. Is it wrong? If so, what is the answer?
Answered by Harley Weston. |
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