Homework Help!10 pts to first to answer!Maths!!!?

Question

When a certain number,N, is divided by d, the remainder is 7. If the original number N is multiplied by 5 and then divided by d, the remainder is 10.find d. what is d??

Answer 1

36

Try going on a maths forum... some really nerdy nerds will sure help you.

Answer 2

d must be 25.

For example, if N = 32

Then 32/25 leaves a remainder of 7

32*5 = 160 and 160/25 leaves a remainder of 10

Another example, if N = 57

Then, 57/25 leaves remainder of 7

57*5 = 285 and 285/25 leaves a remainder of 10

N will always be a solution for 25*K + 7 where k is any positive integer.

Hope that helps.

Answer 3

It's impossible, I just tried everything.

EDIT: I just tried 36, it doesn't work.