About the game
Arithmetic — mental math online for free
Arithmetic is a game of mental arithmetic and quick thinking. Solve 10 math examples against the clock without making more than three mistakes. It suits all ages and needs no registration or download: open the page and play right in your browser — on a computer, tablet or phone.
Every day brings a new puzzle of the day. Choose a mode — addition and subtraction only, with multiplication, or with division — and try to beat your time and keep your streak.
How to play Arithmetic
- 1Choose a mode: + −, + − × or + − × ÷.
- 2Solve the example in your head and enter the answer.
- 3Watch your mistakes: you can make no more than 3, otherwise the round is lost.
- 4Solve all 10 examples as quickly as you can — time is your result.
What the examples look like
47 + 38
91 − 56
Addition and subtraction
Basic mode: plus and minus only.
47 + 38
12 × 7
Plus multiplication
Multiplication is added to addition and subtraction.
12 × 7
84 ÷ 6
Plus division
The full set: all four arithmetic operations.
The examples are for illustration: in the game the numbers and operations are picked anew for every round.
Difficulty levels
| Mode | Operations | For whom |
|---|---|---|
| Easy | + − | For a quick warm-up and beginners |
| Classic | + − × | For those who know the multiplication table |
| Hard | + − × ÷ | For experienced players |
Tips for faster mental math
- Round to tens: 47 + 38 is easier as 47 + 40 − 2.
- Break numbers into place values: tens first, then ones.
- Learn the multiplication table — it speeds up both multiplication and division.
- Check division with multiplication: if 84 ÷ 6 = 14, then 14 × 6 should give 84.
- Do not rush to guess the answer — you can make no more than three mistakes.
Why play with us
A new puzzle every day
The puzzle of the day updates every 24 hours, and the timer shows the time until the next one.
Statistics and streaks
Track your results, completion time and winning streak.
Free and no registration
Start playing right away: no account or app install needed.
Comfortable on any device
The responsive interface works equally well on phones and computers.
Frequently asked questions about Arithmetic
How many examples do I need to solve in Arithmetic?
Each round has 10 math examples. The timer runs, and the faster you finish, the better your result.
How many mistakes can I make?
You can make no more than 3 mistakes. If there are more, the round is considered lost.
When does a new puzzle appear?
A new puzzle of the day appears every 24 hours. The timer until the next puzzle is shown on the main game screen.
Do I need to register to play?
No. You can play for free without registration. Your statistics and streak are stored in your browser.
How do the difficulty levels differ?
The levels differ in the set of operations: addition and subtraction, plus multiplication, plus division. The more operations, the harder it is to calculate in your head.