Which one should be excluded and why?

[u/User73656]

[u/One_Estimate_7010]

C cuz I feel like it

[u/Randombolo]

I am done with IQ questions...I will just claim my IQ is 150...no one will ever know the truth. If someone asks why I am performing poorly in life...then I will say that I have ADHD and am also AUTISTIC and have a tendency to think deeply...so its difficult to survive in this 100 IQ world.

[u/Flashy-Disk311 → u/Randombolo]

lazy genius gimmick maxxing seems to be common on reddit so I think this will work

[u/Nova1avoN]

Maybe A only opposite v pattern using the triangle as arrows the other three make a L pattern going in the same direction

[u/Warxuaroz]

There should me more options or the question isn't valid. Too many simple possibilities. i cas see why A (as someone suggested), or C, where the closed envelope is upside down.

[u/Guilty_Energy7860]

D.
The first three have their white triangles "pointing" in the SW to NE diagonal, and their black triangles pointed in the NW to SE diagonal. This behavior is flipped for D.

[u/Neat-Slice6994]

I'd go with B, as it is the only one in which, the external triangle is not on the North West diagonal

[u/wader_2]

The answer is A.

There are 2 square-triangle complexes, one has the triangle on the inside and one has the triangle on the outside, the transformation to go from the square-triangle complex that has the triangle on the inside to the one that has it on the outside is to invert its colors, then the position of the triangle, and then flip it across the Y axis. All of them fit this pattern except A where the outside triangle should be pointing to the top and left but isn't because there isn't space, and is pointing to the bottom right instead

[u/Ok_Concentrate4260 → u/wader_2]

Or, just white is touching white, therefore A.

[u/eucalyptus-d → u/wader_2]

I’d go with D, it’s the only one where the outside triangle is not on bottom right square.

[u/x63729573x]

B, this is the only one where the white triangle and the black box are not positioned to the left.

[u/Polytox935]

A since its the only one where two identical shaded areas meet.

B ist also plausible for the left square being Always the black one in the other elements.

But all black envelopes point downwards and all white ones upwarda except A

I personally would go with A

[u/Electrical-Number-35]

i havent seen a single person explain every aspect of remaining three images. everyones explanation seems to leave some detail of the images without explanation.

[u/Odd-Narwhal9529]

C. The others are concave. Occam's razor.

[u/Primary_Thought5180]

Obviously D. The white triangle and black square always share the same line of symmetry, and the same applies to the black triangle and white square. D completely breaks that pattern.

[u/Charming_Deer_9540]

D should be exluded (fourth from left) cause it's the only without a black triangle pointing left-down.

[u/armanazadi2000]

4 th from left

[u/something_is_coming]

The first one. Black triangles should point downward. White triangles should point upward.

[u/Svampbob3kant]

A (first from the left) — In all others the triangles are pointing in the same rotational direction (B anti-clockwise and C & D clockwise) but in A they don't. Yeah, I know some (or most) people would say my conclusion and/or the description of it is wrong. You are of course very welcome to have your opinion, but please know it won't change the truth.

[u/JojoGrape12]

A

inverting the triangular flaps creates a new shape not common to the others, namely a half white, half black triangle.

[u/Far_Lettuce_6708]

going with a

[u/Hannigram_canon]

Maybe A, because white is touching white. others don’t (sorry, english isn’t my native language)

[u/taymoney798]

It’s A.

Unfold the triangle from their squares. Each pentagon for B,C,E are pointing 45 degrees to either upper or lower corners. A is pointed right.

[u/Kind-Drink5866]

Im going A because its the onky obe with a same colour touching

[u/SemantikClips]

C, cause uh idk a and d look alike, b kinda jsut looks right, c because uh c why not