21x
Blackjack for Math Lovers!
21x is a new maths-puzzle game just like Blackjack, you win by getting your hand to 21, but unlike Blackjack each card is a different formula. Find the value for X that makes your hand score 21 and you win! The game features cards by renowned mathematicians and communicators in a limited edition numbered box, that was produced only once.
Features
- Can be learned in 1 minute
- Games can be played in 5
- Easy, medium, and hard cards
Whats in the box
- 54 core cards (X and N)
- 6 custom unique celebrity cards
- 4 player aid cards
- 1 deluxe card insert
- 1 rulebook
- 50 expansion cards (Y and V)
How to play
Most cards feature N, X or both on them. N is equal to the number of cards you have, while X can be any integer of your choice (except 0). X must be the same across all your cards and you can change it at any time.
Everyone plays simultaneously to try to get 21 first. At any time a player can “twist” and draw another card from the deck. This could help them, but will make N bigger in the process.
f a player makes 21, they announce it, state their X value and show their working. If they’re correct, they win!
Alternatively, if a player can’t make 21 but is close, they can call “stick” and state their X value (you may not stick or win with exactly 20). This gives all other players just 1 minute to beat that score. Whoever is closest to 21 at the end of the timer, wins!
