I'm thinking of a number between 1-100...
1/5 and 1/3 of the number are both integers.
there are 9 other integers in between 1/5 and 1/3 (excluding them).
(Easy question for most of you)
I think the OP means 1/3 and 1/5 of the integer.
Well, set up your equation. Let n be this number you're trying to find. So, the difference between and should equal to 10 (you want 9 integers between (1/3)n and (1/5)n but when you subtract 2 numbers, you include the number you start with which adds 1 to the number of integers in between them. For example, if you want the number of integers between 6 and 3, it's 2. But 6 - 3 = 3 (one more than 2) because you include 6 ).
So you have your equation: