Ithought of a number, then divided it by another number, and got a result of 7. think of the possible values for my number and the number i divided it by. what number is impossible to divide by? what number can my original number not be? my number is a multiple of ? the number i divided my number by can be any number but ? my number cannot be a number which we cannot divide by ?

Let the first unknown number be 
And the second unknown number be 

We know that  ÷  = 7

My number is a multiple of 7 and also multiple of 
This is because of 7 ×  = 
-----------------------------------------------------------------------------------------------------------

The number I divided my number by can be any number but ZERO
Because  ÷ 0 is undefined
--------------------------------------------------------------------------------------------------------------

My number cannot be a number which we cannot divide by SEVEN
Because  ÷  = 7, so  must be divisible by 7 to obtain