21X: Blackjack for Math Lovers

Photo of some cards from the game arranged on a table. The front of the cards have playing card-style pips (hearts, diamonds, spades, clubs) but the numbers are algebraic expressions, like '8X' or '2^N'. The back of the cards are black, with an intricate gold design that says '21X' in the middle and has a beautiful geometric pattern covering the rest of the card

Photo of a white person's hand taking a card from a pile of 21X cards. Some other cards are face-up on the table, and there are also snacks

Photo of an older white woman with glasses holding up the 2-N and -NX cards and looking excited, while the people around clap and point

Photo of two people playing 21X. A smiling white man looks down at two cards on a table, while a woman with long curly hair and a t-shirt that says something about board games points at one of the cards.

Photo of 21X box and cards laid out on a table. The box is π times as wide as it is long, and has 21X on the front. The cards visible on the table are 2-2X, 2N-2X -X/2, 4N/X and N^3-2X, and each have different combinations of symbols on representing those quantities.

Photo of 21X box and cards laid out on a wooden table. The box is π times as wide as it is long, and has 21X on the front. The cards visible on the table are 6X, 10, 2X+4, N^3-2X, 24/X and 2N-2X, and each have different combinations of symbols on representing those quantities.

21X is a light, fast paced card game that fuses Blackjack with algebra.

Like Blackjack, you’ll be dealt 2 cards with the objective of getting them to add up to 21. However, the cards you’re being dealt, have a twist to them… they’re algebraic formulae!

It’s a perfect gift for maths loving friends and family members, a fun algebra learning tool for schools and fantastic for avid maths puzzlers.

Price = 2477 pence (the 367^th prime number) = £24.77