Question

What should come in place of the question mark (?) in the following number series.

52 25 27 ? 208 1648

A 40 Correct Answer Incorrect Answer
B 50 Correct Answer Incorrect Answer
C 55 Correct Answer Incorrect Answer
D 65 Correct Answer Incorrect Answer
E 70 Correct Answer Incorrect Answer

Solution

52 × 0.5 – 1 = 25 25 × 1 + 2 = 27 27 × 2 – 4 = 50 50 × 4 + 8 = 208 208 × 8 – 16 = 1648

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