Question

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

4 5 12 39 160 ?

A 795 Correct Answer Incorrect Answer
B 797 Correct Answer Incorrect Answer
C 800 Correct Answer Incorrect Answer
D 805 Correct Answer Incorrect Answer
E None of these Correct Answer Incorrect Answer

Solution

4 ×1+1= 5 5 ×2 +2= 12 12×3+3= 39 39 ×4+4= 160 160 ×5+ 5 = 805

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