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Which least number must be subtracted to 899 to make a perfect square?

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answer is D.

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Detailed Solution

Given number is 899.
Calculating the square root of 899 by division method.
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Here, the remainder is 58.
It represents that the square of 29 is less than 899 by 58.
Therefore, a perfect square will be obtained by subtracting 58 from the given number 899.
So, perfect square = 899 - 58 = 841.
Therefore, option (4) is correct.

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