All the given numbers are perfect squares except 198
The given numbers:
To find:
- non perfect square number among the given numbers
A perfect square is obtained by multiplying two equal integers
The perfect squares obtained by multiplying two equal integers are shown below.
- 64 = 8 x 8 (it is a perfect square)
- 81 = 9 x 9 (it is a perfect square)
- 121 = 11 x 11 (it is a perfect square)
The non-perfect square is shown below
- 198 = 14.07 x 14.07 (14.07 is not an integer, hence 198 is not a perfect square)
Thus, all the given numbers are perfect squares except 198
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