Question

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

12                           13                          30                           99                           412                         ?

A 2085 Correct Answer Incorrect Answer
B 2105 Correct Answer Incorrect Answer
C 1205 Correct Answer Incorrect Answer
D 2418 Correct Answer Incorrect Answer
E None of these Correct Answer Incorrect Answer

Solution

12 × 1+12 = 13 13 × 2 + 22  = 30 30 × 3 + 32 = 99 99 × 4 +42 = 412 412 × 5 + 52 = 2085

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