3
$\begingroup$

There are currently 33 questions on Mensa's "Online IQ Test" which I took for fun. I correctly answered 32 questions and understand why they are correct, but there is one remaining question (to which I only know the answer to because answers are hardcoded in the page's JS) whose answer I do not understand.

Can someone explain to me why the following is correct (question 11)?

Answer D in question 11 is correct, but why?

I'm not saying it shouldn't be correct - just that I don't understand why. I don't follow the progression at all.

$\endgroup$
2
  • 3
    $\begingroup$ With most 'IQ tests', it's more a matter of 'the person who invented the puzzle thought of this one particular undefined sequence, with a weird rule which is just as weird as any of the rules that could generate the other answers'. $\endgroup$
    – boboquack
    Oct 26, 2017 at 9:17
  • $\begingroup$ Yeah, I suppose. I just felt it was strange that I was able to figure out all of the other "weird rules" except this one. $\endgroup$ Oct 26, 2017 at 14:32

1 Answer 1

5
$\begingroup$

if we consider every image has a center. the first image has 2 lines, second image has 3 lines which is (2+1) and the third has 5 (3+2). so the final image can have 8 lines(5+3).

$\endgroup$
6
  • 2
    $\begingroup$ Maybe mention what that sequence is famously called? $\endgroup$
    – APrough
    Oct 26, 2017 at 14:27
  • $\begingroup$ Thanks! What I think threw me off was getting stuck on thinking the first image had just one line. $\endgroup$ Oct 26, 2017 at 14:29
  • 2
    $\begingroup$ @APrough if you're referring to the Fibonacci sequence, there's not enough data to know that this is one. 2, 3, 5, 8 are certainly part of a Fibonacci sequence which starts at one, but it could also be part of the following sequence: 2, 3, 5, 8, 12, 17, etc (which I think is more likely) $\endgroup$ Oct 26, 2017 at 14:35
  • $\begingroup$ I thought it was 1 line, 3 lines, 5 lines, and I answered C which was 7 lines (and also incorrect). $\endgroup$ Oct 26, 2017 at 14:39
  • 1
    $\begingroup$ @Octopus, because the first image isn't one line. I'm not claiming it is. I was just explaining where my mental block was. I was incorrect, but I didn't understand why I was incorrect. Now that it's been pointed out to me it seems obvious, but I needed help getting there. $\endgroup$ Oct 27, 2017 at 3:31

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.