Trilemma can be played by up to 4 players. When the game begins, each player chooses to take questions from one of three bands according to their age and ability.
Players take cards in turn. Each card shows a mathematical question, whose answer is a number or set of numbers between 1 and 100.
The player answers the question by putting a counter on the appropriate number. The winner is the first player to get three counters in a row.