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It is from http://www.programaths.com/iqchallenge/index.php It was one of the last items. I didn't have any clue what the solution was. I know the answer but it is the solution and the reasoning to it that I can't comprehend. enter image description here

Edit : The corrected the image was how the test was before: now it is clear which one is the answer.

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    $\begingroup$ What exactly is the question? Are the four symbols at the bottom possible answers? If so, answers to what question? $\endgroup$ – Jens Apr 10 at 17:30
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    $\begingroup$ Yes the four on the bottom are the 4 possible answers for the puzzle . $\endgroup$ – stefan samoil Apr 11 at 10:01
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The answer to this is

D (the last option)

The reason is:

In each pattern the top rows are dependent on the rows below it using a simple rule. The colour of a ball is the colour that occurs the most amongst the three balls nearest to it in the row below. So if you have three consecutive balls in a row, their most used colour is given to the ball directly above the middle one.
The only pattern amongst the four options that satisfies this rule is the last one. The others all have a white ball above a triplet containing two or three black balls.

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  • $\begingroup$ He has already found the answer... $\endgroup$ – Deepthinker101 Sep 26 at 9:51
  • $\begingroup$ @Deepthinker101 I provided the reasoning that was missing. I don't think the questioner knew the reasoning, as the added edit was probably about the updated image making it clear which patterns were the answer options and which were part of the question (and probably should have read "which ones are the answers"). $\endgroup$ – Jaap Scherphuis Sep 26 at 11:06
  • $\begingroup$ Oh I see, it is a very good find. What hinted at it? $\endgroup$ – Deepthinker101 Sep 26 at 11:17
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I think it's the 1st one because in each odd step the leftover black dots consist to conversion to white dots ,on second thoughts it's similar to the game of life(simulation).

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