Privacy policy

Last updated: October 8, 2026.

Worksheets and settings

Worksheets are made in your browser. Your last settings are stored only in your own browser (local storage), so they are still there when you come back. Answers typed on screen are checked in the browser and are not sent to our servers.

Statistics

We use Cloudflare Web Analytics to count visits. It does not use cookies and does not identify you; we only see totals such as the number of visits per page and per country.

Advertising

This site shows ads served by Google AdSense. Google and its partners may use cookies or similar technologies to show ads and measure them. Where the law requires it, for example in the European Economic Area, the United Kingdom and Switzerland, you are asked for consent through a Google-certified consent tool before any personalized advertising.

You can learn how Google uses data at https://policies.google.com/technologies/partner-sites and manage personalized ads at https://adssettings.google.com.

Hosting

The site is hosted by Cloudflare, which processes technical data such as IP addresses to deliver pages and protect them from attacks.

Your rights

Under the GDPR you can ask to access, correct or delete your data, object to its use or file a complaint with your data protection authority. Write to [email protected].