How do you play Googol? Why does Dobble work? Is there a winning strategy in numerical tic-tac-toe? Who actually owns the fish? What secret lies behind Sudoku? Is it worth playing roulette? And why did the goat-and-car game divide the mathematical world into two camps? All these questions are linked to games you’ll get to try for yourself — and together, we’ll look for mathematical answers. Winning these games may not make you a millionaire, but we’ll uncover some true mathematical treasures. And as we all know: those who play don’t misbehave... and might even get rich — at least in mathematics!