The 6th in the series. What two figures (one in range a-i and the other in range 1-9) are the odd ones that should be switched to restore both patterns, and why?

created by myself

  • $\begingroup$ is the organisation of the two sets significant? or is the order random? $\endgroup$
    – Jasen
    Mar 2, 2018 at 11:34
  • $\begingroup$ @Jasen The sets are independent of each other but the patterns they are based on are very similar $\endgroup$ Mar 2, 2018 at 16:37

1 Answer 1


Starting to identify patterns:

enter image description here


there are a handful of patterns one line/change away from others. Not sure if that is relevant yet.

First guess

is to swap top right of a-i (c) and mid right of 1-9 (6).

  • 1
    $\begingroup$ Your "guessing" was perfect! ;) That switch also make sure the distribution of filled and hollow circles is even out among the lines and columns, and some more minor details add up to the best patterns available. $\endgroup$ Mar 2, 2018 at 7:14
  • $\begingroup$ @Plarsen What other details? Didn't even think about it being a distribution of the items across rows or columns. $\endgroup$
    – Jordan.J.D
    Mar 5, 2018 at 15:36
  • 1
    $\begingroup$ @JordanJD Every small figure follow a pattern, for example in the right pattern, center figure: Alternating triangle with plus/dot from left to right and top to bottom (the triangles are somewhat distorted with an overlay of dot/lines and pluses following other patterns). The center figure in the left figure is also alternating triangle with plus/dot. $\endgroup$ Mar 5, 2018 at 18:15

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.