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प्रश्न
Write the possible unit's digit of the square root of the following number. Which of these number is odd square root?
657666025
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उत्तर
The unit digit of the number 657666025 is 5. So, the only possible unit digit is 5. Note that 657666025 is equal to (5 x 23 x 223)2. Hence, the square root is an odd number.
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