Question

How many natural numbers lie between 9^2 and 10^2?

1) 17
2) 18
3) 19
4) 20​

Answer 1

9^2

= 9×9

=81

10^2

=10×10

=100

There are 19 numbers between 81 and 100

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Answer 2

2) 18 is the answer.

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