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प्रश्न
What will be the unit digit of the square of the given number?
799
योग
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उत्तर
- We know that if a number has its unit’s place digit as a, then its square will end with the unit digit of the multiplication a × a.
- Since the given number has its unit’s place digit as 9, its square will end with the unit digit of the multiplication (9 × 9 = 81), i.e., 1
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