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प्रश्न
The following number are obviously not perfect square. Give reason.
7928
उत्तर
- The square of numbers may end with any one of the digits 0, 1, 5, 6, or 9. Also, a perfect square has an even number of zeroes at the end of it.
- 7928 has its unit place digit as 8. Therefore, it cannot be a perfect square.
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