Question
Find the wrong no in the given number series. 3,
7, 15, 31, 63, 127, 255Solution
ATQ,
Observe the pattern: 3 × 2 + 1 = 7 7 × 2 + 1 = 15 15 × 2 + 1 = 31 31 × 2 + 1 = 63 63 × 2 + 1 = 127 127 × 2 + 1 = 255 Hence, there is not wrong no so series is correct
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