Question

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

11      6      7      12      26       ?       205.5

A 72.5 Correct Answer Incorrect Answer
B 62.5 Correct Answer Incorrect Answer
C 65 Correct Answer Incorrect Answer
D 67.5 Correct Answer Incorrect Answer

Solution

11 x 0.5 + 0.5 = 6  6 x 1 + 1 = 7  7 x 1.5 + 1.5 = 12 12 x 2 + 2 = 26 26 x 2.5 + 2.5 = 67.5   67.5 x 3 + 3 = 205.5

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