Which of the following is not a perfect square?

A. 16384
B. 18496
C. 11025
D. 2218

A number having 2,3,7 or 8 at end place is never a perfect square.

So, 2218 contains 8 at the end 2218

In other words no square number end in 2,3,7 or 8.

The number of zero at the end of a perfect square is always even

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