Question
Find the wrong number in the given number series.
4, 9, 19, 39, 69, 159Solution
ATQ, 4 Ă 2 + 1 = 9 9 Ă 2 + 1 = 19 19 Ă 2 + 1 = 39 39 Ă 2 + 1 = 79 79 Ă 2 + 1 = 159 Therefore, 79 should come in place of 69.
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