What could be the possible ‘one’s’ digits of the square root of the number $9801$ ?

None of the above

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0, 1

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1, 9

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0, 9

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Solution

The correct option is C $1, 9$
Ones digit of the given number is 1.
If the ones digit of the number is $1$ or $9$ , then only its square has ones digit = $1$ .
So, answer is option $a$ .

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What could be the possible One’s digits of the square root of each of the following numbers?

$(i) 9801$

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9801

Question 1 (i)
What could be the possible ‘one’s’ digit of the square root of following number:
9801

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