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Math Help - Help with a simple math MCQ

  1. #1
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    Help with a simple math MCQ

    Q: 71116222631...

    A: 32
    B:34
    C:36
    D:37
    E39


    can anyone solve and explain this to me?

    would greatly appreciate it.

    and sory if i posted it in the wrong section
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  2. #2
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    Quote Originally Posted by Frak View Post
    Q: 71116222631...

    A: 32
    B:34
    C:36
    D:37
    E39


    can anyone solve and explain this to me?

    would greatly appreciate it.

    and sory if i posted it in the wrong section
    Hi Frak,

    7, 11, 16, 22, 26, 31

    7, 7+4=11, 11+5=16, 16+6=22

    22, 22+4=26, 26+5=31

    There is a pattern.
    What value should you add to 31 ?
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  3. #3
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    Wow, Archie, I am impressed! How did you manage to make sense out of the original post?
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  4. #4
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    Quote Originally Posted by Archie Meade View Post
    Hi Frak,

    7, 11, 16, 22, 26, 31

    7, 7+4=11, 11+5=16, 16+6=22

    22, 22+4=26, 26+5=31

    There is a pattern.
    What value should you add to 31 ?
    thanks Italian man

    to carry on with the sequence, 31 +6 = 37

    is there a formula to figure out the sequence or just common sense/logic?
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  5. #5
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    Talking

    is there a formula to figure out the sequence or just common sense/logic?

    At this level, it's more a matter of pattern recognition

    A formula could be developed but is just too unwieldy
    in terms of spotting the pattern.
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  6. #6
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    Quote Originally Posted by Archie Meade View Post
    is there a formula to figure out the sequence or just common sense/logic?

    At this level, it's more a matter of pattern recognition

    A formula could be developed but is just too unwieldy
    in terms of spotting the pattern.
    I think its called Fibonacci number

    Fibonacci number - Wikipedia, the free encyclopedia
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  7. #7
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    Hi Frak,

    the Fibonacci sequence of numbers is generated in a different way.

    The next number in that sequence is found by adding the two numbers before it.

    Written as a formula, it is X_n=X_{n-1}+X_{n-2}

    or X_{n+2}=X_{n+1}+X_n

    or X_{n+1}=X_n+X_{n-1}

    and so on.

    For your sequence, you could formulate it as something like

    X_{n+1}=X_n+4+[(n-1)\ mod\ 3] if n-1 is non-negative,

    for X_1=7
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