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One number in 2, 3, 7, 22, 89, 445, 2677 is WRONG. Which one?

Competition practiceNumber Series

A445
B89
C22
D2677

Step-by-Step Solution

Rule: multiply by n and add 1 —

2 \times 1 + 1 = 3, 3 \times 2 + 1 = 7, 7 \times 3 + 1 = 22, 22 \times 4 + 1 = 89, 89 \times 5 + 1 = 446, 446 \times 6 + 1 = 2677

. So 445 should be 446.

Answer: A) 445

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