Answers to Math Challenge Problems 15, 16, 17
15. There were 51 students in school that day. 16. 5040 is the smallest counting number divisible by the first ten composite numbers. 17. The three numbers ar 8.85, 10.3, and 10.85. read more
Math Challenge Problem #19
Solve for N if 6!*7!=N! read more
Math Challenge Problem #20
If you continued the triangular array of numbers shown, what number would be directly below 122? . . . read more
Answer for Problem of the Week 9
47 (Base 10) = 101111 (Base 2) 47 (Base 10) = 142 (Base 5) 47 (Base 10) = 57 (Base 8) read more
Answer to Problem of the Week 10
The fourth number is 10. read more
Math Challenge Problem #11
If grapefruit are piled in a pyramid with one grapefruit in the top layer, 4 in the second layer (from the top), 9 in the third layer, and 16 in the fourth layer, how many grapefruit will be needed to make a pile with 10 layers? read more
Math Challenge Problem #12
In a recent survey, 40% of households contained two or more people. Of those homes containing only one person, 25% contained a male. What is the percentage of all houses that contain exactly one female and no males? read more
Math Challenge Problem #13
The points A, B, C, D, and E are located on a straight line, in order, in accordance with the following conditions. What is the distance from B to C? **The distance from A to E is 20 cm. **The distance from A to . . . read more
Math Challenge Problem #14
An 8.5 X 11-inch sheet of paper is cut in half lengthwise, while an identical sheet of paper is cut in half widthwise. Do the resulting half sheets have the same area, the same perimeter, both the same area and perimeter, or neither . . . read more
Answers for Problems Week 6
Mystery Number 1: 36 Mystery Number 2: 64 read more
Math Problem of the Week 7
A prime number is a positive counting number greater than 1 that has only two factors, 1 and itself. Five is a prime number because it has only two factors, 1 and 5. Twin primes are two prime numbers whose difference is 2. . . . read more
Answers for Problems Weeks 1 and 2
Correct answers for both weeks have been submitted. Week 1--The correct answer was Wednesday. Week 2--Mary is 16; Bob is 8; Jane is 12. read more
Math Problem of the Week 3
If
$ BURN BURN = Money to
Burn
and
MOSTOLENEY =
STOLEN MONEY
THEN
WHAT IS
. . .
read more
