Question

How many natural numbers lie between the square of 9 and 10?

Answer 1

Answer:

$\large{ \: {9}^{2} = 81}$

$\large{ \: {10}^{2} = 100}$

so,

$\large{ \: 100 - 81 - 1}$

$\large{ \: = 18}$

Hence,

There are 18 Natural Numbers between the squares of 9 and 10.

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Answer 2

Given,

The range is the square of 9 to the square of 10

To Find,

The natural number between given range =?

Solution,

Square of  9 = 81

Square of 10 = 100

Range = 81 - 100

The Natural numbers between 81 - 100 = 100  - 81 = 19

But in this count 81 is included so we will reduce it by 1,

The Natural numbers between 81 - 100 = 18

Hence, 81 natural numbers lie between the square of 9 and 10.