Question
In each of the following number series, one term is
wrong. Find the WRONG term. 1, 5, 14, 31, 55, 91Solution
Check increments as squares: 1 + 2² = 1 + 4 = 5 5 + 3² = 5 + 9 = 14 14 + 4² = 14 + 16 = 30 (but term is 31) 30 + 5² = 30 + 25 = 55 55 + 6² = 55 + 36 = 91 So the third term should be 30, not 31. Wrong term = 31
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