Exams › IBPS PO › Quantitative Aptitude
What should come in place of the question mark '?' in the following number series? 50, 51, 55, ?, 80, 105
- I
- 47
- 22
- 64
Correct answer: 64
Solution
The series follows the pattern of adding consecutive squares: 50 + 1 = 51, 51 + 4 = 55, 55 + 9 = 64, 64 + 16 = 80, and 80 + 25 = 105. So the missing term is 64.
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