Question

What should come in place of question mark ‘?’ in the following number series?

7       12       34       117       ?      2465      14820

A 416 Correct Answer Incorrect Answer
B 392 Correct Answer Incorrect Answer
C 368 Correct Answer Incorrect Answer
D 464 Correct Answer Incorrect Answer
E 488 Correct Answer Incorrect Answer

Solution

7 × 1 + 5 = 12  12 × 2 + 10 = 34  34 × 3 + 15 = 117  117 × 4 + 20 = 488   488 × 5 + 25 = 2465 2465 × 6 + 30 = 14820

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