Faster, sharper sumsMental arithmetic is a skill like any other. A minute of daily practice makes you quicker and more accurate with numbers.
Useful every daySplitting a bill, working out a discount, checking a quote or an invoice before you sign it. Fluency with numbers saves time and catches mistakes.
Confidence, not talentMost people who say they're "bad at maths" are out of practice. The divisions show your progress week by week.
How does scoring work?
Each correct answer scores by its level: 1 point for warm-ups up to 6 for the hardest sums. Get 5 in a row and every answer after that earns a bonus point until you slip. Wrong answers and skips score nothing and reset your combo.
Why does only my first run count?
Everyone gets the same sums each day. If you could replay them, you'd learn the answers. Your first run is your honest score; practice rounds use fresh sums and don't go on the board.
What are the divisions?
They group players by sprint score: Abacus (0–19), Slide Rule (20–44), Calculator (45–79), Mainframe (80–129) and Quantum (130+). Most adults start in Slide Rule or Calculator.
When does a new sprint or trap start?
At midnight UTC, which is midnight in Ireland and the UK during winter and 1am in summer.
BODMAS or PEMDAS?
They're the same rules with different names: Brackets (Parentheses), Orders (Exponents), Division and Multiplication left to right, then Addition and Subtraction left to right. Ireland and the UK say BODMAS; the US says PEMDAS.
Can people cheat with a calculator?
They can, but it's slow. Typing each sum into a calculator costs far more time than it saves, and it ruins the fun. Scores that look humanly impossible will be hidden as the game grows.
What do you store?
The name and country you enter, your sprint scores and trap answers, a random ID that keeps your scores together on this device, and an email only if you choose to give one. Names and scores appear on the leaderboard. Your email is never shown to other players. The full details are in our privacy notice.
Is it OK for kids?
Yes, there are no ads and the sums suit confident readers from about age 8. Children under 16 should play alongside a parent, use a first name or nickname, and not enter an email address.