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enter image description here

Please help with that Mensa Romania IQ test question. I think it's B, but why?

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    $\begingroup$ "I think it's B, but why?" Only you know why you think it's B. $\endgroup$
    – msh210
    Commented Dec 17, 2020 at 6:16

2 Answers 2

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The answer is

E

because

The third column shows the lines that are different between the first two columns. That is, if a line segment appears in both the first two columns, then it will not appear in the third; likewise if a line segment appears in neither of the first two columns it will not appear in the third. However any line segment that appears in exactly one of the first two columns will be present in the third column.
In a computer-science context, you might say that the columns are related by exclusive-or (XOR) - applying that operation to any two columns will yield the other.

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  • $\begingroup$ And the same is true for rows. $\endgroup$
    – msh210
    Commented Dec 17, 2020 at 6:15
  • $\begingroup$ Good point - once I saw the pattern I mentioned, I stopped looking $\endgroup$
    – lxop
    Commented Dec 17, 2020 at 19:55
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The answer is the letter E Using a simpler example so you can easily understand, look at this image:enter image description here

(forgive me for my English and the quality of the image because I did it by hand on my cell phone).

basically if a line in the 1st square is in the same position as the line in the 2nd square, it cancels itself out in the 3rd square, if the lines are not repeated they will appear in the 3rd square. If a line appears in the 1st square and nothing appears in the 2nd square or vice versa, the figure will only appear in the 3rd square. Using this same logic in your question, the letter E should be the correct answer.

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  • $\begingroup$ Welcome to Puzzling.SE! Please be aware that this is an English-language site, so answers are expected to be provided in English. We cannot rely on Google Translate or user translations as they may not be entirely accurate. Would you be able to translate this into English for us? $\endgroup$
    – F1Krazy
    Commented Dec 29, 2023 at 13:37
  • $\begingroup$ Ah sorry, a Google translation should do the trick? because my English is horrible... :v $\endgroup$
    – Rhyx
    Commented Dec 30, 2023 at 1:50
  • $\begingroup$ That should do, thank you. $\endgroup$
    – F1Krazy
    Commented Dec 30, 2023 at 9:59

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