Math practice · reimagined
Sequence
Turn Sequence 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
Sequence
Pick a fighter, choose Sequence, 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 sequence is a line of numbers that follows a secret rule. Your job is to crack the rule and say what comes next.
In 2, 4, 6, 8, … each number jumps up by 2, so next is 10. Look at the gap between neighbours — if it's always the same, just add that gap again.
Type the next number in the pattern.
Every level of Sequence
- T1ArithmeticGrade 4 · 9 yrsConstant step: +n.Play free ▸
- T2GeometricGrade 9 · 14 yrsConstant ratio: ×n.Play free ▸
- T3MixedGrade 9 · 14 yrsStep grows by a rule.Play free ▸
- T4Skip countingGrade 1 · 6 yrsCount on by 2s, 5s or 10s.Play free ▸
- T5Explicit nth termGrade 9 · 14 yrsSubstitute n into the formula.Play free ▸
— Quick answers —
Sequence: the short FAQ
- Is Sequence free to play?
- Yes. Sequence 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 Sequence 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 Sequence?
- Nope. Sequence runs in any browser, on a laptop, tablet or phone.
- Can Sequence be used in the classroom?
- Absolutely. Teachers run Sequence with a whole class and track who's improving — see the schools plan for per-student pricing and a teacher dashboard.