Question

Which of the following numbers are perfect squares?
11, 12, 16, 32, 36, 50, 64, 79, 81, 111, 121

Answer 1

(i) 11 it is a prime number.So it is not a perfect square.

(ii) 12 is not a perfect square.

(iii) 16= (4)² 

\(\therefore\) 16 is a perfect square.

(iv) 32 is not a perfect square.

(v) 36= (6)² 

\(\therefore\) 36 is a perfect square.

(vi) 50 is not a perfect square.

(vii) 64= (8)² 

\(\therefore\) 64 is a perfect square.

(viii) 79 it is a prime number. So it is not a perfect square.

(ix) 81= (9)² 

\(\therefore\) 81 is a perfect square.

(x) 111 it is a prime number. So it is not a perfect square.

(xi) 121= (11)² 

\(\therefore\) 121 is a perfect square.