Question

The square of 5 is 25
The square of another number is also 25
What is that other number?

Answer 1

-5

Explanation:

Hi! Our task is to determine the other number.

The square of 5 is 25. So, 5² = 25.

The square of another number is also 25. So, that number² = 25.

If that number's squared, it means that:

that number × that number = 25

But that number isn't 5 ! Then what is it? You guessed it ! It's -5. Only -5 could be the other number.