Question

Which of the following are perfect squares: (i) 49 (ii) 64 (iii) 121 (iv)156 (v) 215 (vi)321 (vii) 256 (viii) 400 give full explanation​

Answer 1

Step-by-step explanation:

1) 49 Yes

= 7² = 7×7 = 49

2) 64 Yes

= 8² = 8×8 = 64

3) 121 Yes

= 11² = 11×11 = 121

4) 156 No

5) 215 No

6) 321 No

7) 256 Yes

= 16² = 16×16 = 256

8) 400 Yes

= 20² = 20×20 = 400