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Finding Square Root through Repeated Subtraction

Square of 659...

Question

Square of 659 by Sutra Ekadhikena Purvena is?

A

21456

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B

434281

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C

412356

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D

52789

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Solution

The correct option is B 434281
(659)²
= (659 + 1) (659 – 1) + 1²
= 660 × 658 + 1
= 434280 + 1
= 434281

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