Exams › IBPS PO › Quantitative Aptitude

What should come in place of the question mark (?) in the following number series? 2, 1, 1, 1.5, 3, ?

1. 6
2. 7.5
3. 9
4. 4.5

Correct answer: 7.5

Solution

The pattern is ÷2, ×1, ×1.5, ×2, ×2.5. Starting from 3, the next step is 3 × 2.5 = 7.5. So the missing number is 7.5.

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