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Question
For the following, find the least number that must be subtracted so that the resulting number is a perfect square.
796
Solution
796
Taking square root of 796, we find that 12 has been left
| 28 | |
| 2 | 7 96 4 |
| 48 | 396 384 |
| 12 |
∴ Least number to be subtracted = 12
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