Exams › IBPS PO › Quantitative Aptitude

In the following number series, one number is wrong. Find the wrong number in the series: 3, 4, 12, 38, 103, 228

1. 103
2. 12
3. 38
4. 228

Correct answer: 38

Solution

The pattern can be seen as multiplying by 3 and adding consecutive integers: 3 → 4 (+1), 4 → 12 (+0?); a better fit is 3, 4, 12, 39, 103, 228 using a consistent rule. Thus 38 breaks the pattern and is the wrong number.

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