See how many addition facts you can answer in the time. Each problem shows on screen, you type the answer and press Enter, and the next one is up straight away. A three-second countdown gives you a moment to read the first one before the clock starts.
When you submit, a line below the box tells you whether you were right and what the answer was — but nothing waits for you to read it, so you never lose time checking. Every miss is listed at the end with the right answer.
Prefer no pressure? Pick the untimed option and there is no clock at all: a running score, and you stop when you like. Open the settings to change the number range or switch operation.
Type the number and press Enter. The next problem appears immediately, so you can keep going without reaching for the mouse. An empty answer skips to the next problem.
No. After you submit, a line under the box shows whether you were right and gives the answer, but the next problem is already there and the box is empty and ready. Read the line if you want to, or ignore it and keep going.
The same quiz with no clock anywhere and no time limit. You get a running score and press Finish when you have had enough. It is there for anyone who does better without a countdown.
Yes. Open “Change what to practise” and set the number range for each side, or switch to a different operation. Your next run uses the new settings.