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Quora User Kumar Ankit has shared this rather tricky puzzle, and it's baffling quite a few of us.
It seems simple at first - just count the triangles in the image. But there are some hidden traps that have flummoxed a umber of people online.
Picture: Kumar Ankit/Quora
No, 'one big one' is not the answer.
Scroll down to find out.
The answer is 24!
Responding to the puzzle on Quora, mathematician Martin Silvertant shared this explainer:
As some users pointed out, you can count 25 triangles if you include the word 'triangle'!
HT Daily Mail
More: How many triangles can you see? Only the very smartest can see 18