Question

Which of the following is not a perfect square? Why?
(a) 361 (b) 1156
(c) 1128 (d) 1681​

Answer 1

361

Explanation:

because the last number was not come in any table

Answer 2

1128 is not a perfect square.

Explanation:

Numbers ending with units digit as 2,3,7 and 8 can never be a perfect square.

Hope this helps you.