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Select the related number from the given alternatives: 8 : 28 :: 27 : ?

A63
B65
C68
D72
Answer & Solution
Correct answer: B. 65
The relationship is 2 cubed to (3 cubed + 1) = 28; similarly 27 is 3 cubed, so the next term is (4 cubed + 1) = 65.
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