Math practice · reimagined
Vectors
Turn Vectors 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
Vectors
Pick a fighter, choose Vectors, 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.
A vector ⟨x, y⟩ is an arrow: go x steps across and y steps up. Its magnitude is just how LONG that arrow is, measured straight from start to tip.
Since the across-step and up-step make a right angle, the arrow is the hypotenuse of a right triangle — so its length is √(x² + y²), the Pythagorean theorem. For ⟨3, 4⟩: √(9 + 16) = √25 = 5. (These are picked so the length always comes out a whole number.)
Square each part, add, take the square root, and type the length.
— Quick answers —
Vectors: the short FAQ
- Is Vectors free to play?
- Yes. Vectors 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 Vectors 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 Vectors?
- Nope. Vectors runs in any browser, on a laptop, tablet or phone.
- Can Vectors be used in the classroom?
- Absolutely. Teachers run Vectors with a whole class and track who's improving — see the schools plan for per-student pricing and a teacher dashboard.