Mensa Romania IQ test question - triangles and circles

Question

Can somebody tell me what is the answer to this puzzle? And why?

a busy cat

Thanks!

Welcome to Puzzling! This is not a [logic-puzzle]; please check the tag wiki before using a tag. — Deusovi, Jul 27 '16 at 13:29
The literal answer to your question would be "Yes. Because people here are smart." since you asked "Can somebody tell me?". But probably not the answer you were looking for. — Floris, Jul 27 '16 at 13:37
@ABcDexter I hope Mensa don't allow communication devices in there :) — Fiksdal, Jul 27 '16 at 18:58
@Fiksdal No, it sure doesn't. Just imagine the puzzling community collectively giving any IQ test... — ABcDexter, Jul 27 '16 at 19:01
For some reason that domain is blocked at the place I'm working. Can you please upload that picture via upload feature(to i.stack.imgur)? — Lafexlos, Jul 28 '16 at 16:08
@Lafexlos That is the standard upload feature, stack has a partnership with imgur — Areeb, Jul 28 '16 at 20:54
What WBT said. I know for the American Mensa test, people aren't allowed to share questions from it. I'd be surprised if the Romanian test (or any other country's, really) was different. — , Apr 28 '17 at 14:04
The image link is now broken. We're left with basically a dead question. — F1Krazy, Sep 25 '19 at 19:33
I've unbroken it. (The site they used -- no idea why they didn't use imgur, but never mind -- moved, but fortunately its URLs didn't change apart from the hostnames.) — Gareth McCaughan, Sep 25 '19 at 20:49

score 54 · Answer 1 · answered Jul 27 '16 at 13:35

54

It is

C

Because the third column

is the difference between the first and second column

answered Jul 27 '16 at 13:35

Floris

1,608
12
14

19

Also works if you look at rows instead of columns. – The Dark Truth Jul 27 '16 at 13:37
2

Ha - that's surprising but true. – Floris Jul 27 '16 at 13:38
Easier to see and two direction variant of the puzzle http://puzzling.stackexchange.com/questions/38009/seemingly-difficult-culture-fair-question – z100 Jul 27 '16 at 15:24

score 17 · Answer 2 · edited Jul 28 '16 at 06:13

17

Answer is

C

Because of

XOR operator, applied on columns. Read more about XOR operator here

edited Jul 28 '16 at 06:13

Hardik Vaghani

133
9

answered Jul 27 '16 at 17:58

Ashish Jain

181
5

2

Hello, and welcome to Puzzling.SE! It is customary to hide your answer with spoiler tags >!. Also, adding a duplicate answer is typically frowned upon unless you can demonstrate a substantially different method of getting there than has been previously mentioned. – feelinferrety Jul 27 '16 at 18:03
1

+1 because, except the edit, the answer is good.. but a bit developer way... you may explain XOR – lemon Jul 27 '16 at 18:07
Added documentation link for XOR operator. – Ashish Jain Jul 27 '16 at 20:33
The XOR principle was covered in earlier answers and comments. – Prune Jul 27 '16 at 22:51
1

This is the cleanest and most specific answer, and an improvement to the previous. – pipe Jul 28 '16 at 08:51

score 14 · Answer 3 · answered Jul 27 '16 at 13:32

14

Correct Answer is

C

Explanation:

Each column and row has exactly 2 circles.
Each of the four corners appears an even number of times in each column or row.

answered Jul 27 '16 at 13:32

The Dark Truth

5,906
1
23
43

2

It looks more to me like you take both pictures, stack them on top of each other, and remove any overlap – Areeb Jul 27 '16 at 13:33
1

@Areeb Different wording but same effect. – The Dark Truth Jul 27 '16 at 13:35
17

Or you could say "XOR the shapes", I believe this sums it up perfectly. – Red-Jeweled Jul 27 '16 at 17:39

IAmInPLS · Answer 4 · 2016-07-27T13:37:41.080

It is

C

Because :

It works by column, and the third picture depends on the two first.

On the last symbol of the line, you add the symbols of the first and second pictures. If a form (triangle or circle) is present twice, you remove it. Else, you leave it. For example, for the first column : You add the first picture :
(1 triangle at the top right corner and 1 at the top left corner, and 1 circle at the middle), and the second one :
(1 triangle at the top right corner, 1 at the bottom left corner, 1 at the bottom right corner, 0 circle in the middle), so you get : 1 triangle at the top left corner, 2 at the top right, 1 at each bottom and 1 circle, so you just remove the top right one and it gives you the picture at the third line of column number 1.

score 0 · Answer 5 · answered Nov 19 '20 at 09:31

The answer is:

C

Because:

The third picture in each row is the first picture plus the second picture, but with a bit of a twist. If a part of the first picture overlaps with another of the second picture, then remove that part when adding the pictures. Or else, continue with the addition. I've also made a picture so that it is clearer:

The parts in red are the parts to be removed, and the others in black are the parts to be combined to form the third picture. Hence, the answer is C, as C is the picture formed when the black parts of the first two pictures of the third row are combined.

score -1 · Answer 6 · edited Jul 27 '16 at 17:29

I think it is simpler - It is

E

I see two rules:

1. If you scan the rows from the top in rows (vertically) or horizontally in columns, there is a rule that there are always two black solid circles in every row. So we are missing something with a solid black circle, possible answers are A, C, E.
2. All of the solid black circle symbols can be paired off as mirror images of each other, like this:
(a) the bottom left symbol is a mirror image of the middle one in the far right column.
(b) The one in the middle of the top row, is a mirror image of the one in the centre of the middle row.

Following this rule, the un-paired solid black remaining is the one at the top left. A mirror image of this is symbol E.

I'm assuming the three white square symbols (with no solid black circle), are just distractions/noise.

Never assume that there is "noise" in these puzzles. – Floris Jul 27 '16 at 17:08 — Floris, Jul 27 '16 at 17:08

Mensa Romania IQ test question - triangles and circles

6 Answers6