Select the figure that is missing from the collection below:
All the possible answers except for A are in the collection. (Some of them just rotated or slightly different). But A is not, there is no triangle with 5 lines in the collection, just one with 4 lines. The most conspicuous thing is that nothing is being "added" to the other three possibilites. (This should make it clear that A is the right answer)
Since the answer already has been accepted I would add this as a comment, but I do not have sufficient points to do so. I agree that the answer should be...
but due to the reason that...
... in the two upper rows, each row contains two figures which encloses an area, and two that does not. Therefore, the figure replacing the question mark should enclose an area, which leaves only figure A.
Each symbol is unique , hence ( since the Mensa authors want this as logic not reasoning ) There's no level of reasonably thinking . So it is a " hence " answer. Answer c) since it is only symbol unique as the others would be repeats and there are no repeats in the symbol grid .