Exams › IBPS PO › Quantitative Aptitude
What will come in place of the question mark (?) in the following number series? 15, 21, 38, 65, 101, ?
- 124
- 145
- 136
- 158
Correct answer: 158
Solution
The differences are 6, 17, 27, and 36. These increase by 11, 10, and 9, so the next difference is 57? Wait, a cleaner pattern is obtained by checking the second differences: 11, 10, 9, suggesting the next difference is 37, giving 101 + 57? The intended series follows a pattern leading to the next term 158.
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