Math practice · reimagined
Square root
Turn Square root 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
Square root
Pick a fighter, choose Square root, 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 square root runs squaring backwards. It asks: "what number times itself gives this?"
√49 = 7 because 7 × 7 = 49. √144 = 12 because 12 × 12 = 144. If you know your squares, you know your roots — they're the same facts read the other way.
These all come out to whole numbers. Type the root.
Every level of Square root
- T1Perfect squaresGrade 8 · 13 yrs√ of squares up to 400.Play free ▸
- T2Add or subtractGrade 8 · 13 yrs√a ± √b — combine two square roots.Play free ▸
- T3PythagoreanGrade 8 · 13 yrs√(a² + b²) — find the hypotenuse.Play free ▸
- T4Mega rootsOLYMPICBig perfect squares and tough triples.Play free ▸
- T5Cube rootGrade 8 · 13 yrsWhat number cubed gives this?Play free ▸
- T6Complex magnitudeGrade 11 · 16 yrs|a+bi| = √(a²+b²)Play free ▸
- T7Simplify a radicalGrade 9 · 14 yrs√(k²×m) = k√m — find the k that comes out.Play free ▸
— Quick answers —
Square root: the short FAQ
- Is Square root free to play?
- Yes. Square root 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 Square root 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 Square root?
- Nope. Square root runs in any browser, on a laptop, tablet or phone.
- Can Square root be used in the classroom?
- Absolutely. Teachers run Square root with a whole class and track who's improving — see the schools plan for per-student pricing and a teacher dashboard.