Question

what numbers that are a perfect square

Answer 1

A perfect square is number whose square root is rational.

Answer 2

Examples of perfect squares:

1, 4, 25, \(\dfrac{25}{36} \), \(\dfrac{1}{4} \), 0.01

Answer 3

Examples of numbers that are not perfect squares:

2, 10, \(\dfrac{1}{10}\), 0.001, \(\dfrac{3}{16} \)