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Which number does NOT belong with the others? 121, 144, 150, 169

Competition practiceReasoning & Mental Ability

A150
B121
C144
D169

Step-by-Step Solution

121 =

1 1^{2}, 144 = 1 2^{2}, 169 = 1 3^{2}

are perfect squares; 150 is not a perfect square.

Answer: A) 150

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