1. What could be the possible ‘one’s’ digits of the square root of each of the following numbers?

 (i) 9801

Answers (1)

We know that square of digits ending with 1 and 9 gives 1 at units place. 

So the number whose square ends in 1 = 1 & 9

So, possible unit digit of the square root of 9801 = 1 and 9.

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