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If a number has 1 in it’s one’s place, what can be it’s square?

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in Mathematics – Class 8 by (91.0k points)
If a number has 1 in it’s one’s place, what can be it’s square?

(a) 91

(b) 144

(c) 169

(d) 121

This question was posed to me during an interview.

Asked question is from Properties of Squares topic in division Squares and Square Roots of Mathematics – Class 8

1 Answer

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Best answer
The correct option is (d) 121

Explanation: We know that if a number has 1 in it’s one’s place the square of that particular number would also have 1 in it’s one’s place. Here there are two options that can be correct but the option 91 couldn’t be correct because it isn’t a perfect square. Therefore the correct option would be 121.

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