Question

Between which two whole numbers is the square root of 18?

Answer 1

It is between 4 and 5 because when you set up the question, you put 18 in a square root sign and solve. As In:
16*Squared = 4
18*Squared = It's between 4 and 5
25*Squared = 5

Answer 2

4 and 5. The square root of 16 is 4 , the square root of 25 is 5. Those two numbers are the closest to 18.