# The 12 most controversial facts in mathematics

Mathematics has little surprises that are designed to test and push your mental limits.

The following 12 simple maths problems prove outstandingly controversial among students of maths, but are nonetheless facts.

They’re paradoxes and idiosyncrasies of probability. And they’re guaranteed to start an argument or two.

If you’re looking for a mathematical way to impress your friends and beguile your enemies, here’s a good place to start.

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