Question
Find the wrong number in the following series.
60, 68, 78, 86, 90, 100Solution
ATQ, 29 + 31 = 60 31 + 37 = 68 37 + 41 = 78 41 + 43 = 84 43 + 47 = 90 47 + 53 = 100 Therefore, 84 will come in place of 86 (so 86 is the wrong number)
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