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Choose the number that best completes the analogy: 42 : 56 :: 72 : ?

Competition practiceAnalogy & Classification

A92
B88
C90
D81

Step-by-Step Solution

Each pair is

n (n + 1)

for consecutive

n : 42 = 6 \times 7, 56 = 7 \times 8

. Likewise

72 = 8 \times 9

, so the match is

9 \times 10 = 90

.

Answer: C) 90

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