Which of the following is a rational number? square root of 36, square root of 37, square root of 38, square root of 39 square root of 36 square root of 37 square root of 38 square root of 39

The answer is square root of 36

because the square root of 36 = 6

whereas the square roots of 37,38 and 39 give you recurring decimals

All the square roots of square numbers are rational. In this case, the square root of 36 would be the answer.

Because the square root of 37 and the square root of 38 result in irrational, recurring decimals, they are NOT rational.