Math practice · reimagined
Probability
Turn Probability into a fight you actually want to win. Every problem is an attack — solve it faster than your opponent and you land the hit.
Ages 4–99+ · no download · plays in your browser · 23 languages
How it works
Probability
Pick a fighter, choose Probability, and trust your numbers. The faster and cleaner you solve, the harder you hit — from gentle early grades all the way to Olympic-level challenges.
Probability starts with counting: out of everything that COULD happen, how many are the outcome you want?
Roll two dice and you can land on 36 different pairs. How many make a total of 7? Count them: 1+6, 2+5, 3+4, 4+3, 5+2, 6+1 — that's 6 ways. Seven is the easiest total to roll because it has the most combinations. The whole skill is listing the winners carefully without missing any or counting one twice.
Count every favorable outcome, and type how many there are.
More math to master
— Quick answers —
Probability: the short FAQ
- Is Probability free to play?
- Yes. Probability is free to play right in your browser — the whole curriculum, no download, no signup. Paid plans later unlock the full fighter roster, every stage and saved progress.
- Who is Probability for?
- Anyone from 4 to 99+. The early grades stay gentle for beginners, while the higher tiers will make even the confident sweat.
- Do I need to download anything to play Probability?
- Nope. Probability runs in any browser, on a laptop, tablet or phone.
- Can Probability be used in the classroom?
- Absolutely. Teachers run Probability with a whole class and track who's improving — see the schools plan for per-student pricing and a teacher dashboard.