Free mental math practice websites, compared
Short answer: for a plain timed arithmetic sprint, Zetamac's Arithmetic Game is the standard and it is free. If you want that sprint plus a saved history, timing for every problem, drills for specific techniques and a daily challenge, R3CK0N does all of it free, with no account needed. DrillYourSkill adds Flash Anzan chains and multiplayer races, with a paid tier for unlimited training. TraderMath is a paid course built around the tests trading firms use.
This page is written by the people who make R3CK0N, so read it as one site's honest view of its neighbours. Every claim below was checked by visiting each site on 4 November 2026. Prices and features change; check the site itself before you rely on a row.
Side by side
| Site | Price | Timed drill | What it covers | Score history | Account | Best for |
|---|---|---|---|---|---|---|
| Zetamac | Free | 30 s to 10 min, 2 min by default | + − × ÷ with any number ranges you type in | No | None | The classic sprint; comparing a score with friends who also use it |
| R3CK0N | Free, no ads | Sprint, levels, custom blends, 80-in-8, daily challenge | + − × ÷ at three levels; times tables; technique drills (× 11, squares, two-digit ×); GRE quant; numpad typing | Yes, with per-problem times; synced if you sign in | Optional | Seeing progress over weeks and finding the facts that slow you down |
| DrillYourSkill | Free to start; Premium for unlimited training | Trainers at five levels, Survival against a clock | + − × ÷ and mixed; Chain Math (Flash Anzan); multiplayer Racer; math tricks | With a free account | Optional; needed for history and the leaderboard | Flash Anzan practice and racing other people live |
| TraderMath | Subscription for full access | Firm-style timed tests | Mental math for trading interviews, plus interview questions and market-making games | Yes | Required | Candidates who want a paid, interview-shaped course |
Zetamac (the Arithmetic Game)
Zetamac is a single page: pick a duration from 30 seconds to 10 minutes, set the number ranges for each operation, and answer as many problems as you can. Subtraction and division are the addition and multiplication ranges in reverse, so a "Zetamac score" is comparable between people who keep the defaults. It is free, needs no account, and does nothing else: no history, no breakdown of which problems were slow. That simplicity is why it became the reference test for quant interview prep. If you only want a number to beat, start here.
R3CK0N
R3CK0N keeps the same two-minute mixed sprint with Zetamac's default ranges, so the scores line up, and records the time taken on every problem. That is the difference in practice: after a run you can see that 7 × 8 and 56 ÷ 7 are the facts costing you seconds, and drill those. Around the sprint sit three difficulty levels and custom blends, one times table at a time, drills for the techniques in Secrets of Mental Math, GRE-style quant drills, an 80-in-8 test, a daily challenge that is the same for everyone, and head-to-head duels. Everything is free with no ads; an account is optional and only syncs your history across devices. It runs in the browser on a phone or a computer.
Start a free drill, no sign-up
DrillYourSkill
DrillYourSkill has a trainer for each operation and a mixed one, each at five levels from Warm Up to Expert, plus Chain Math, its name for Flash Anzan, where numbers flash past and you keep a running total. Its games are social: Racer is a live multiplayer race, Survival runs against an accelerating timer, and there is a leaderboard and teams. You can train without registering; a free account saves progress, streaks and your leaderboard place, and a Premium plan removes the training limits. Pick it for Flash Anzan or for racing other people in real time.
TraderMath
TraderMath is interview preparation for traders rather than a general trainer: timed arithmetic tests shaped like the ones specific firms use, a bank of interview questions, and market-making games. Full access is a subscription and needs an account. It suits a candidate who wants a structured, paid course for a particular hiring process. For the arithmetic part alone, the free sites above cover the same ground; our guide to mental math for trading interviews explains what the tests look like.
How to choose
- You want one number to beat and nothing else: Zetamac.
- You want to see whether you are actually getting faster, and where: R3CK0N. A saved history with per-problem times is the thing none of the free alternatives keep.
- You want Flash Anzan or live races: DrillYourSkill.
- You are preparing for one firm's test and will pay for a course: TraderMath, after you have done the free sprints first.
Whichever you pick, the method is the same: short daily sessions, timed, aimed at the facts that are slowest for you. The guide to getting faster at mental math covers it in seven steps.
Frequently asked questions
Which free mental math website is best?
For a bare timed sprint, Zetamac. For the same sprint with a saved history, per-problem timing, technique drills and a daily challenge, R3CK0N, which is also free and needs no account. DrillYourSkill is the pick for Flash Anzan and multiplayer races.
Is Zetamac free?
Yes. The Arithmetic Game at arithmetic.zetamac.com is free and needs no account. It does not keep a history of your scores.
Which mental math site tracks your progress?
R3CK0N keeps every run, with the time taken on each problem, in your browser or synced to an optional account. DrillYourSkill keeps statistics and streaks once you make a free account. Zetamac keeps nothing between sessions.
What should I use for a trading interview mental math test?
Practise the sprint format first on Zetamac or R3CK0N's Sprint mode, then the 80-questions-in-8-minutes format on R3CK0N's free 80-in-8 test. TraderMath sells firm-specific test simulations if you want a paid course on top.