Find the missing number: 4 → 16, 6 → 36, 9 → ?
A72
B54
C81CORRECT
D18
Common EntranceQuantitative ReasoningNumber Relationships
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Why the answer is C, and why the others tempt you.
Each number is multiplied by itself: 4 x 4 = 16, 6 x 6 = 36, so 9 x 9 = 81.
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