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Pick out the incorrect number in the series 2, 3, 7, 22, 89, 445.

Competition practiceNumber Series

A445
B89
C22
D7

Step-by-Step Solution

Rule:

\times 1 + 1, \times 2 + 1, \times 3 + 1, \times 4 + 1, \times 5 + 1

. After 89 comes

89 \times 5 + 1 = 446

, so 445 is wrong.

Answer: A) 445

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