Q2 of 67 Page 168

The last digit of a perfect square can never be

A. 12 = 1, 112 = 121, and so on. The last digit of these perfect squares is 1.


C. 52 = 25, 152 = 225, and so on. The last digit of these perfect squares is 5.


D. 32 = 9, 132 = 169, and so on. The last digit of these perfect squares is 9.


Hence, the last digit of a perfect square can never be 3.

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