Logical Problems


Direction: Look carefully for the pattern, and then choose which pair of numbers comes next. Note also that you will be choosing from five options instead of four.

  1. 28 , 25 , 5 , 21 , 18 , 5 , 14











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    This is an alternating subtraction series with the interpolation of a random number, 5, as every third number.

    Correct Option: A

    This is an alternating subtraction series with the interpolation of a random number, 5, as every third number. In the subtraction series, 3 is subtracted, then 4, then 3, and so on.


  1. 2 , 8 , 14 , 20 , 26 , 32 , 38











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    This is a simple addition series,

    Correct Option: B

    This is a simple addition series, which begins with 2 and adds 6.



  1. 9 , 11 , 33 , 13 , 15 , 33 , 17











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    In this alternating repetition series, a random number,

    Correct Option: A

    In this alternating repetition series, a random number, 33, is interpolated every third number into a simple addition series, in which each number increases by 2.


  1. 18 , 21 , 25 , 18 , 29 , 33 , 18











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    This is a simple addition series with a random number, 18, interpolated as every third number.

    Correct Option: D

    This is a simple addition series with a random number, 18, interpolated as every third number. In the series, 4 is added to each number except 18, to arrive at the next number.



  1. 20 , 20 , 17 , 17 , 14 , 14 , 11











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    This is a simple subtraction with repetition series. It begins with 20,

    Correct Option: E

    This is a simple subtraction with repetition series. It begins with 20, which is repeated, then 3 is subtracted, resulting in 17, which is repeated, and so on.