Question
Find the wrong number in the given number series.
7, 15, 29, 49, 75, 107Solution
ATQ,
7 + (8 × 1) = 15
15 + (8 × 2) = 31
31 + (8 × 3) = 55
55 + (8 × 4) = 87
87 + (8 × 5) = 127
So, 29 is incorrect and should be 31.
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