Question

There is/are ___ perfect square/squares between 50 and 70.

Answer 1

If we check the squares of 1 digit numbers, 64, the square of 8, is the only perfect square which lies between 50 and 70. The squares of 7 and 9 are 49 and 81 respectively which lie outside this range. Therefore there is one perfect square between 50 and 70.