Math practice · reimagined
LCM
Turn LCM 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
LCM
Pick a fighter, choose LCM, 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.
LCM means "least common multiple" — the smallest number that BOTH numbers divide into evenly.
For 4 and 6: count up in 4s (4, 8, 12…) and in 6s (6, 12…) — they first meet at 12. So lcm(4, 6) = 12. It's like two friends with different step sizes — when do they next land on the same spot?
Type the smallest shared multiple.
— Quick answers —
LCM: the short FAQ
- Is LCM free to play?
- Yes. LCM 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 LCM 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 LCM?
- Nope. LCM runs in any browser, on a laptop, tablet or phone.
- Can LCM be used in the classroom?
- Absolutely. Teachers run LCM with a whole class and track who's improving — see the schools plan for per-student pricing and a teacher dashboard.