Question

What could be the possible one’s digit of the square root of 121 ?

6, 7

3, 4

1, 9

7, 8.

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Answer 1

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121 = 1+3+5+7+9+11+13+15+17+19+21. Thus , 121 is a perfact square.

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Answer 2

Answer:

1,9 could be the possible one’s digit of the square root of 121.