Question

what is perfect square?​

Answer 1

the number inside the root should be a square of other number for example root 4 , four goes in the table of 2 therefore it is a perfect square of 2 , perfect square mean multiplying same number two times for example 2×2 =4 , 3×3=9 , 4×4=16

Answer 2

Perfect Squares are the Squares where the unit digits can come in 0,1,4,5,6,9
And not in 2,3,7,8
For eg:
1029 is a perfect Square as the unit digit is 9

Whereas

1028 is not as the unit digit is 8