Question

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

12      18      31     51     ?     112

A 92 Correct Answer Incorrect Answer
B 101 Correct Answer Incorrect Answer
C 78 Correct Answer Incorrect Answer
D 86 Correct Answer Incorrect Answer
E None of these Correct Answer Incorrect Answer

Solution

12               18             31             51              78             112         +6               +13           +20         +27           +34                   +7               +7            +7            +7

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