How many positive integers have a value between the square root of 8 and the square root of 72?

Question

My 8th grade daughter can get the answer with a calculator but needs to know how to do without a calculator. Thanks.

Answer 1

sq rt of 8 is greater than 2 and less than 3.

sq rt of 72 is greater than 8 and less than 9.

So, answer is 3, 4, 5, 6, 7,8.