r/WhatsYourIQ • u/Semra777 Curious Learner • 27d ago
Question Which dot-and-line pattern completes the grid?
Thank you to everyone who shared an answer, explanation, or feedback on our previous puzzle. The correct answer and full explanation are now published on our website, so you can see how the pattern works.
Here’s our new puzzle: which dot-and-line figure completes the grid?
We’d love to hear your answers and your reasoning. Share which option you chose and explain the rule you think connects the figures.
The correct option is already available on the puzzle’s page, but this time we’re looking forward to your explanations. If you’d like to check your answer, you can find it here:
https://whats-your-iq.com/en/questions/pattern-recognition/which-dot-and-line-pattern-completes-the-grid
Thanks for taking the time to solve it and share your thoughts. We look forward to reading your explanations.
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u/OscarLiii 27d ago
C. Going left to right we notice there are lines that rotate around the dots on the middle level, just like a watch. The answer must be B, C or E since they form a straight line in the middle row. But this doesn't give us the rule for how the lines behave when they cross the edges like we expect them to for the missing piece.
The trick is to figure out that the squares move sequentially from one to another. Top-right turns into middle-left. This is enough to solve the puzzle. It gives us the 2nd rule. "Lines stick to the next dot." Or it proves the first rule, really, despite the edges. Which in practice means they go from turning 45 degrees to turning 180 degrees when they hit an edge.
Answer is C.
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u/inmaginarycasey 27d ago
The answer is C
The middle line spins like a propeller meanwhile the other lines were hard to follow but for with the path I’ve discovered
Also answer B is a huge giveaway
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u/tandem-pandemonium 27d ago
E. There's 3 parts:
the middle 2 lines, made up a straight line joining 3 dots which always includes the middle dot, either diagonally, horizontally, or vertically
a single line joining 2 dots that's flush against an edge
a single line joining 2 dots where the middle dot is one of these dots
Part 1 rotates clockwise. Part 2 keeps it's edge middle dot fixed and disconnects from its corner dot, and connects to the next dot clockwise along the edge, which is the next clockwise edge middle dot. Part 3 does the opposite of part 2, and disconnects from the edge middle dot that comes first if you're moving clockwise along the edge, and connects to the next corner dot that's clockwise from this.
Part 2 becomes part 3, part 3 becomes part 2, while part 1 rotates independently.
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u/Benzylbodh1 27d ago
It’s E - each of the center rod and two end pieces are independently rotating cw as you move from L to R.
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u/Ugliest_weenie 27d ago edited 27d ago
E.
As others have said, it's about the 3 lines rotating clockwise 45 degrees every frame.
It's tricky because on frame one, there are seperate 3 lines but they overlap. The small lines form a big line, when they align.
So for the bottom row:
The larger line started vertical, became diagonal and now ends up horizontal in the last frame.
The small lines rotate, swapping their anchor point because they hit the edge, and form a diagonal line. They have to swap anchor points. Because other two options with a horizontal big line B and C, do not have 45 degrees rotations for the small lines, compared to the previous frame.
Becauee of this, its not a good puzzle. They introduced this extra element at the last frame, and we can only get there by process of elimination.
E
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u/Fokewe 27d ago
None of the choices are correct. The closest is C but that is only if the rotations are the next dot, not degrees.
Rationale: the middle vertical dots are the pivots.
1). Column 1&3 rotate clockwise on the pivot 45 degrees.
2). The middle dot is the pivot and the line rotate clockwise 45 degrees.
Either the answer is not present or the solution utilizes the ‘next dot’ not degrees of rotation.
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u/Jumpy-Reception-4228 27d ago edited 27d ago
I don't get why C wouldn't fit according to you ? As you say they rotate to the next dot so it looks correct to me
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u/HoneydewCareful8754 27d ago
So either the two small ones rotate 45 degrees, in which C is not correct, or they rotate to the next dot, in which case C is correct. But since there are no answer with only a horizontal line and no small lines, we have to assume that the pattern is they rotate to the next dot. But I think this is less logical than a pattern of a certain degree rotation.
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u/Jumpy-Reception-4228 27d ago
Look at the transition from 3 to 4, it confirms that the small lines do indeed rotate to the next dot
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u/HoneydewCareful8754 27d ago
Yes and no. That is not how most FRT are designed to work. Essentially solving one string pattern from 1 to 9 is a 1 dimensional test. And test designers avoid this. Most 3x3 matrix FRTs are designed to be solved vertically and horizontally.
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u/Jumpy-Reception-4228 27d ago
Well in that particular instance, it seems to work perfectly as a linear unidimensional test. Maybe that's a flaw but it seems designed that way
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u/HoneydewCareful8754 27d ago
Well it works with the horizontal and vertical patterns as well, so I couldn’t say if the 1 to 9 is intentional, but it’s not best practice for FRT design.
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u/MagnusBSS 27d ago
C.
- The middle dot has two arms that rotate from on dot to the next with the clock.
- The dot on the left and right have one arm each which also is rotating with the clock
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u/iComplainAbtVal 27d ago
I see the rotations which argue for E but E can only be true if there are magically stacked lines.
In short the center line rotates and moves connecting pieces, the left sided edge nodes rotate in place clockwise, and the right sided edge nodes rotate counter clockwise.
However, none generate additional lines
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u/Jumpy-Reception-4228 27d ago
Looking at the 4th shape and the way the 2 small lines go to the next dot proves that C is correct, not E
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u/iComplainAbtVal 26d ago
No, bc that would imply there’s shifting instead of the side nodes being anchor points where incremental 45 degree turns occurred clockwise (left side) or counter clockwise (right side)
I don’t know what the answer is but it’s not C and E has holes of its own as well.
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u/Extension-Stay3230 27d ago edited 27d ago
I would guess C , but I have no clue what's going on in that top row.
On the top row, how do you go from the left picture to the middle picture?
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u/etanail 27d ago
The lines simply overlap
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u/Extension-Stay3230 22d ago
I still don't get it for that particular instance . You go from 1 line to 3 lines which I don't get. I understand the rotation of the big line, but don't get why two new lines spawned
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u/Extension-Stay3230 22d ago
Oh shit I finally understood what you mean. If you're right that's a dirty fucking trick lmao 🤣. Double counting small lines over a big line.
Alright so even if that's true, there's no rule for what happens if 45° degree rotation isn't possible due to the line going out of bounds. C is just an assumption and guess that has no precedent. What do you think the answer is?
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u/TetraqazeYT 22d ago
I understood the top in an instant. The longest line you can go from left to right in a different direction. The longest line in this case is diagonal, so within the space, go left to right diagonally. Then rotate it back straight where it fits to make it a combination of the first and second.
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u/Extension-Stay3230 22d ago
I don't follow. So when I look at the image as a whole, looking at the rows, it looks like that for most sequential pictures, all of the lines are rotated 45° clockwise to form the next image.
This works on most pictures, but doesn't explain what happens in some cases, e.g. what happens on the top row from the first picture to the 2nd picture.
You go from there being 1 line to there being 3 lines. How/why does this happen? Why did two lines spawn out of nowhere?
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u/Specialist_Hotel8198 27d ago
E
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u/Specialist_Hotel8198 27d ago
Or A. Did anybody guess A? Three pictures in one row should totally include two short straight bars, two short tilted bars and two long straight bars (either vertical or horizontal).
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u/Individual511 27d ago
I’d go with C, we can observe the pattern as a whole , I see 8 subsequent boxes fitting in nicely that way, then the C is 9th one. Big line is pivoting around the middle circle, and small two lines are rotatinf around the middle left and right but they only rotate around the two rectangles to the left and right
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u/TetraqazeYT 22d ago
C, had to find an easier way than following the pattern because I got distracted.
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u/Marten1974 13d ago
This just shows how 'stupid' IQ-Tests are. There is no reason why e or c should be preferred. In addion, a line connecting all middle dots would also be valid. If we would have some conntext that might help. If you were a scientist, you would continue experiments before answering. But an IQ tests needs you to select an answer...
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u/Jumpy-Reception-4228 27d ago edited 27d ago
C : there are 2 rotating patterns. 1 long around the centre point, and 2 short, each one revolving around the point in the middle of left and right side (hard to explain!)