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प्रश्न
Find the greatest number of three digits that is a perfect square.
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उत्तर
As we know that the least number of four digit is 999.
Let's find the out the square root of 999 by using long division method.
| 31 | |
| 3 | `bar9` `bar99` |
| 9 | |
| 61 | 99 |
| 61 | |
| 38 |
Hence, the least number of four digits that is a perfect square
= 999 – 38
= 961
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