Got this number sequence puzzle from a friend. enter image description here

  • 2
    $\begingroup$ Where did the friend get it from? $\endgroup$
    – bobble
    Commented Apr 28 at 14:14
  • 1
    $\begingroup$ Reddit, I think. $\endgroup$ Commented Apr 28 at 19:58

1 Answer 1


I think the answer is


The rule is

enter image description here To generate the next number in the sequence. You multiply the previous number of the sequence by a number. That number is -4 less than the number you used to generate the previous number in the sequence. So we have 2 x 3, 6 x -1, -6 x -5 and 30 x -9!!!

  • $\begingroup$ Damn 10 upvotes thanks! $\endgroup$
    – PDT
    Commented Apr 29 at 15:54

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