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Q: Which of the following numbers is not a perfect square?
  • A. 41,616
  • B. 16,384
  • C. 23,102
  • D. 97,344
Correct Answer: Option C - The unit digit of any perfect square number can be 0, 1, 4, 5, 6 and 9, while 2, 3, 7 and 8 cannot. The unit digit of the number given in option (c) is 2.
C. The unit digit of any perfect square number can be 0, 1, 4, 5, 6 and 9, while 2, 3, 7 and 8 cannot. The unit digit of the number given in option (c) is 2.

Explanations:

The unit digit of any perfect square number can be 0, 1, 4, 5, 6 and 9, while 2, 3, 7 and 8 cannot. The unit digit of the number given in option (c) is 2.