Question

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

    10      11       12        20       24 

         ?
    A 51 Correct Answer Incorrect Answer
    B 41 Correct Answer Incorrect Answer
    C 61 Correct Answer Incorrect Answer
    D 71 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    10 + 13   =11 11 +1=12 12 +23 =20 20 +22 =24 24 + 33 = 51

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