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Find the wrong number in the series: 5, 11, 24, 50, 106, 217

Competition practiceNumber Series

A50
B106
C24
D217

Step-by-Step Solution

Pattern:

\times 2 + 1, \times 2 + 2, \times 2 + 3, \times 2 + 4, \times 2 + 5.5 \times 2 + 1 = 11, 11 \times 2 + 2 = 24, 24 \times 2 + 3 = 51, 51 \times 2 + 4 = 106, 106 \times 2 + 5 = 217

. So 50 should be 51.

Answer: A) 50

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