BlackJack Math
Offers
Trailers & screenshots
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About BlackJack Math
BlackJack Math is a number logic game where every answer is 21. You swap cards to change the result of each calculation and complete the puzzles.
Puzzle levels
The game has 50 handcrafted levels, with originally composed music to accompany you as you solve them.
Frequently asked questions
The best price for BlackJack Math is $0.64 at K4G. That is 35% less than on Steam, where it costs $0.99. 2 shops have an offer that activates in your country.
Some are. This page only shows offers that activate in your country; offers for other regions, or with no stated region, are left out. To see the offers for another country, change your country at the top of the page.
Every key we list activates on Steam. Redeem the key there and BlackJack Math stays in your library for good.
Yes, with a small risk. Publishers create keys to sell in other shops, which is why a key can cost less than in the official store, and once you activate it the game is yours to keep, just like a store purchase. On average 1–2% of keys fail, so check the shop's buyer protection before you buy: the official store does not refund keys bought elsewhere.
The minimum requirements for BlackJack Math are: Windows 7, 2 GB RAM, 60 MB storage. It also runs on macOS. The recommended specs are in the System requirements section.
No. BlackJack Math is a single-player game.
Mostly, yes. Valve rates BlackJack Math as Playable on the Steam Deck: it runs, but may need some manual setup.
Buy BlackJack Math 35% cheaper than on Steam.
BlackJack Math is available for 35% less in shops such as K4G.
Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.
Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.











