Solve as many as you can of the selected mental arithmetic questions in the alotted time. Results are saved locally so you can track accuracy and volume over multiple attempts.
Configure operations and ranges, set a duration, and press Start. Each problem appears large in the centre — type your answer and press Enter to submit.
All results are stored in your browser's
localStorage. Nothing leaves your device.
This project was inspired by the zetamac arithmetic tool that is familiar to most wanting to practice mental maths online. It can be found here.