Which of the following numbers can possibly be a perfect square?
Show answer & explanation
Correct answer: D
Explanation
Numbers that could be perfect squares:
245982, 496838, 178343, 571536
The unit digits of a perfect square number can only be 0, 1, 4, 5, 6, or 9.
245982 → Last digit is 2 (Not a perfect square)
496838 → Last digit is 8 (Not a perfect square)
178343 → Last digit is 3 (Not a perfect square)
571536 → Last digit is 6 (Could be a perfect square)