Question

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

Answer 1

Here,

16, 36, 64, 81 and 121 are the perfect squares.

Explanation :

16 = 4²

36 = 6²

64 = 8²

81 = 9²

121 = 11²

So, these numbers are the squares of the numbers 4,6,8,9 and 11 respectively.

Square of numbers from 1 to 10 :

1² = 1

2² = 4

3² = 9

4² = 16

5² = 25

6² = 36

7² = 49

8² = 64

9² = 81

10² = 100

Answer 2

Answer:

We should continue this process till the square of the integer exceeds all the numbers in the given set. 11, 12, 32, 50, 79, 111 are not perfect squares which is the required answer.