Question

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

1                 5          13             25                          41               ?

A 71 Correct Answer Incorrect Answer
B 81 Correct Answer Incorrect Answer
C 61 Correct Answer Incorrect Answer
D 63 Correct Answer Incorrect Answer
E None of these Correct Answer Incorrect Answer

Solution

02 + 12 = 1 12 + 22 = 5 22 + 32 = 13 32 + 42 = 25 42 + 52 = 41 52 + 62 = 61

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