Exams › IBPS PO › Quantitative Aptitude
In the following number series, a wrong number is given. Find out the wrong number: 23, 27, 18, 34, 9, 42
- 42
- 23
- 27
- 18
Correct answer: 42
Solution
The odd-position terms are 23, 18, 9, which decrease by 5 and then 9, while the even-position terms should follow a consistent pattern. The term 42 does not fit the intended alternating pattern, so it is the wrong number.
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