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प्रश्न
Using prime factorisation, find which of the following are perfect squares.
841
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उत्तर
Prime factors of 841 = (29 × 29)
| 29 | 841 |
| 29 | 29 |
| 1 |
As grouping, there is no unpaired factor left over.
So, 841 is a perfect square.
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