How many natural numbers lie between $102$ and $112$ ?

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answer is B.

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Detailed Solution

The given pair of numbers are

102, 112

.
Between the squares of the numbers n and (n+1), there are 2n non-square numbers.
Implement the above concept.
Here n = 10.
So, the number of natural numbers lie between

102 and 112

2 × 10 = 20

.
Hence, the number of natural numbers lie between

102 and 112

is 20.
Therefore, option 2 is correct.

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