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I was puzzled by the pattern sequence in the following picture. What is the pattern to show up in the box? This is a question from a primary school workbook for selective high examinations in Sydney.

enter image description here

Thank you very much for your help!

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  • $\begingroup$ interestingly, there is a pattern of 4, 8, 12 in the amount of line segments that make up the figures. However none of the options have 16. $\endgroup$ – Legorhin Oct 3 at 20:19
  • $\begingroup$ Many thanks to everyone who has come in to join in the crack of the puzzle. All the thoughts put forward here are quite innovative in a way. Personally, I agree with the solution by @Lidaranis because that is the difference which is least arguable so far. Thank you again for your participation! $\endgroup$ – Michael May Oct 5 at 11:43
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2. There are no right angles in the sequence, and 2 is the only one without right angles.

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  • $\begingroup$ This is more convincing then @K Sharing's answer. $\endgroup$ – Duck Oct 4 at 0:09
  • $\begingroup$ Yes, agree that +1. And think that it's puzzle for primary school should not to be so complicated. $\endgroup$ – Conifers Oct 4 at 2:52
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The answer should be 2. It is basically w, x, y, and z. However, the letters are a bit modified.

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    $\begingroup$ The third one hardly looks like y... $\endgroup$ – Deepthinker101 Oct 3 at 13:38
  • $\begingroup$ look at the two diagonal lines $\endgroup$ – K Sharing Oct 3 at 13:39
  • $\begingroup$ Yeah I see it but it seems kinda weak. $\endgroup$ – Deepthinker101 Oct 3 at 13:40
  • $\begingroup$ I was thinking the same but it doesnt seem convincing $\endgroup$ – Deepthinker101 Oct 3 at 13:41
  • $\begingroup$ I mean you can kind of distort 4 to make it a z $\endgroup$ – Deepthinker101 Oct 3 at 13:48
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I believe 2 since the (smaller) angle between any two intersecting lines should be the same in all figures (45 degrees).

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  • $\begingroup$ The third image in the sequence has 60-degree angles $\endgroup$ – Daniel Mathias Oct 3 at 20:19
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I think the answer could be 5 because it is a question of analogies the first is w to x, x is after w by one in the alphabet and so squares are 'after' triangles because the squares has one more side than the triangles.

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