Question

I thought 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 ?

Answer 1

Let the first unknown number be $x$
And the second unknown number be $y$

We know that $x$ ÷ $y$ = 7

My number is a multiple of 7 and also multiple of $y$
This is because of 7 × $y$ = $x$
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The number I divided my number by can be any number but ZERO
Because $x$ ÷ 0 is undefined
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My number cannot be a number which we cannot divide by SEVEN
Because $x$ ÷ $y$ = 7, so $x$ must be divisible by 7 to obtain $y$

$\frac{x}{y} =7$
$\frac{x}{7} =y$
$7y=x$