Question

Harriet thinks of a number.

She squares it and then adds 11.
Harriet's answer is 36.
What was her original number?

Answer 1

5

Explanation:

36-11=25

the square root of 25 is 5. you just have to do the problem backwards

Answer 2

Let the original number be x
X^2 + 11 = 36
Subtract 11
X^2 = 25
Square root both
X = 5
Solution: her original number is 5