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Find the WRONG number in the series: 2, 6, 12, 20, 32, 42, 56

Competition practiceNumber Series

A6
B20
C32
D42

Step-by-Step Solution

The series is

n (n + 1) : 1 \times 2, 2 \times 3, 3 \times 4, 4 \times 5, 5 \times 6, 6 \times 7, 7 \times 8 = 2

, 6, 12, 20, 30, 42, 56. The 5th term should be 30, not 32.

Answer: C) 32

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