Robe Theorem

A strategy for roulette where the player places an equal bet on two of either the 1st, 2nd, or 3rd 12. This allows the player to have about a 63% chance of multiplying their bet by 1.5.

Using the Robe Theorem, Calum placed $50 on the 2nd and 3rd 12, so he had about a 63% chance of turning that $100 he bet into $150.