The least number added to 6421 to make a perfect square by long division method ?
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Hey mate, here is your answer :
The answer is 140, the perfect square is 6561 and it's square root is 81, that is,

Hope this answer helps you...!!!
The answer is 140, the perfect square is 6561 and it's square root is 81, that is,
Hope this answer helps you...!!!
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