Question

EXERCISE 6.3

1. What could be the possible one's digits of the square root of each of the following number ??

(a)9801

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Answer 1

Here, the last digit is 1. So, its square root can have 1 or 9 as its unit digit. (ii)99856 - Here, the last digit is 6. So, its square root can have 4 or 6 as its unit digit.

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