Question

What will come in place of the question mark (?) in each of the following series?

15 25 40 65 ? 195

A 110 Correct Answer Incorrect Answer
B 115 Correct Answer Incorrect Answer
C 150 Correct Answer Incorrect Answer
D 120 Correct Answer Incorrect Answer
E 130 Correct Answer Incorrect Answer

Solution

15 × 2 - 5 = 25 25 × 2 - 10 = 40 40 × 2 - 15 = 65 65 × 2 - 20 = 110 110 × 2 - 25 = 195

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