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Find the wrong term in the series: 3, 4, 10, 33, 136, 690, 4116

Competition practiceNumber Series

A33
B4116
C690
D136

Step-by-Step Solution

Pattern:

\times 1 + 1, \times 2 + 2, \times 3 + 3, \times 4 + 4, \times 5 + 5, \times 6 + 6.136 \times 5 + 5 = 685

, not 690, so 690 is wrong

(685 \times 6 + 6 = 4116

confirms it).

Answer: C) 690

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