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Write the possible unit’s digits of the square root of the following numbers. Which of these numbers are odd square roots?(i) 9801(ii) 99856(iii) 998001(iv) 657666025 |
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Answer» (i) 9801 Since, unit digit of 9801 is 1 \(\therefore\) Unit digit of square root = 1 or 9 Since the number is odd, square root is also odd (ii) 99856 Since, unit digit of 99856 = 6 \(\therefore\) Unit digit of square root = 4 or 6 Since the number is even, square root is also even (iii) 998001 Since,unit digit of 998001 = 10 \(\therefore\) Unit digit of square root = 10 or 9 Since the number is odd, square root is also odd (iv) 657666025 Since, unit digit of 657666025 = 5 \(\therefore\) Unit digit of square root = 5 Since the number is odd, square root is also odd |
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