Exams › IBPS PO › Quantitative Aptitude

Find the missing number in the series: 5, ?, 215, 425, 705, 1055

1. 75
2. 100
3. 80
4. 125

Correct answer: 75

Solution

The differences between terms are 70, 140, 210, 280, and 350. So the missing term is 5 + 70 = 75, and the rest of the series matches the same pattern.

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