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प्रश्न
Find the square of the following number:
512
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उत्तर
We know:
The square of a three-digit number of the form 5ab = (250 + ab)1000 + (ab)2
\[\therefore\] 5122 = (250+12)1000 + (12)2 = 262000 + 144 = 262144
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