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Which is the least number which must be subtracted from 5607 to make it a perfect square?

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131

121

111

101

answer is A.

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Detailed Solution

Let us try to find 5607 by long division method.

We get the remainder 131.

It shows that 742 is less than 5607 by 131.

This means if we subtract the remainder from the number, we get a perfect square.

Therefore, the required perfect square is 5607 – 131 = 5476.

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