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  • Which of 123^2, 77^2, 82^2, 161^2, 109^2 digits would end with digit 1 ?

Q. Which of  123^{2},77^{2},82^{2},161^{2},109^{2}  would end with digit 1 ?

Answers (1)

best_answer

It is known that if a number has 1 or 9 in the unit's place, then it’s square ends in 1.

So squares of 161 and 109 would end with the digit 1.

Posted by

Devendra Khairwa

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