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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
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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