6 votes

Prove that π > 3

Starting with three squares of side 1, we can rearrange them into dodecagon. The total area of the squares or dodecagon is 3. After we eat dodecagon out of the pizza (wheel), the scraps make up the ...
2 votes

Arrange ten coins in a bowling formation. Fewest pennies to remove so no three pennies that remain have centers that form an equilateral triangle?

Not a proof, but if you look at it as a satisfiability problem, Z3 (SMT solver) can be of some help here: ...
  • 21
1 vote

Can you Avoid the Spear-Wielding Gladiator?

  • 4,083

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