The number 75 falls between 64 and 81, which are both perfect squares.
To find out whether a number is a perfect square, we can take the square root of said number. If the answer is a whole number, then the number is a perfect square.
The square root of 64 is 8 and the square root of 81 is 9, so they are both perfect squares. We know that 75 is between the numbers 64 and 81, therefore our answer is correct.
