Study the pattern: 2, 3 → 6; 4, 5 → 20; 3, 7 → ___
A4
B24
C21CORRECT
D10
Common EntranceQuantitative ReasoningNumber Grids
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Why the answer is C, and why the others tempt you.
In each case the two numbers are multiplied: 3 x 7 = 21.
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