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Q.

The least number to be subtracted from 16800 to make it a perfect square, is

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a

139

b

159

c

129

d

None of these

answer is A.

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Detailed Solution

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First, we have to find the square root of 16800 by long Division method.

This shows that (129)2 is less than 16800 by 159, So the least number to be subtracted from 16800 is 159.

Required perfect square number= 16800- 159= 16641

√16641 = 129

Hence, the required this number is 159.

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