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Three of the following four numbers are alike in a certain way and one is different. Which one does NOT belong to the group?

Competition practiceAnalogy & Classification

A150
B169
C121
D144

Step-by-Step Solution

121 =

1 1^{2}, 144 = 1 2^{2}

and

169 = 1 3^{2}

are all perfect squares. 150 is not a perfect square, so it is the odd one out.

Answer: A) 150

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