Question

How many non perfect squares are there between 9^2and 11^2

Answer 1

EXCEPT = 10^2 ==> 100

81 AND 121

SO, 121 - 81 ==> 40

40-1 ==> 39

ANSWER = 39

Answer 2

9² = 81

11² = 121

Find the number of numbers between 81 and 121

Number of numbers = 121 - 81 - 1 = 39

Find the number of perfect square:

Between 9² and 11², there is only 1 perfect square, that is, 10² = 100

Find the number of non perfect square:

Number of non-perfect square = 39 - 1 = 38

Answer: There are 38 non-perfect squares between 9² and 11²