Question
42, 85, 172, 343, 687,
1375 Find out the wrong number in the given number series.Solution
ATQ, 42 X 2 + 1 = 85 85 X 2 + 1 = 171 171 X 2 + 1 = 343 343 X 2 + 1 = 687 687 X 2 + 1 = 1375 Therefore, 171 will come in place of 172.
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