11, 12, 13, 10, 15, 8, -------------------, 6

  • Option 1)

    17

  • Option 2)

    6

  • Option 3)

    18

  • Option 4)

    19

  • Option 5)

    16

Answers (1)

11, 12, 13, 10, 15, 8, -------------------, 6

It is the combination of two series at alternate positions. First series follows the pattern of +2

and second series follows the pattern of -2. Like 11+2=13, 13+2=15 and so on. Second series

is 12-2=10, 10-2=8 and so on.

So, at the end, 15+2=17

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