Exams › IBPS PO › Quantitative Aptitude

What should come in place of the question mark (?) in the following number series? 25, 34, 45, 58, 73, ?

1. 110
2. 0 र
3. 90
4. 80

Correct answer: 90

Solution

The differences are 9, 11, 13, and 15, increasing by 2 each time. The next difference is 17, so 73 + 17 = 90.

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