Privacy

20 Problems is a daily math game that works without an account.

Game data and feedback

The game stores a random device identifier in your browser’s local storage. The server uses this identifier to remember your daily attempt and stores your game progress, score, answers’ results, and timing. The leaderboard shows generated player names, scores, and completed problem counts. Clearing browser storage removes the identifier from your browser, but does not delete records already stored on the server.

If you send feedback, the server stores your message, optional name, device identifier, and submission time. You do not need to provide your name or other personal information to play.

Analytics and hosting

The game uses Google Analytics to measure visits and usage. Google may use cookies and collect information about your browser, device, and interactions. The site is hosted on Cloudflare, which processes requests to serve the game. Fonts are loaded from Google Fonts.

Advertising

When advertising is enabled, Google AdSense and its partners may use cookies, web beacons, IP addresses, or other identifiers to serve and measure advertisements. Personalized ads may use information from visits to this and other websites. Where a consent message is shown, you can use its controls to manage your choices.

Learn about how Google uses information from partner sites, its privacy policy, and ad personalization controls.

Questions

You can send privacy questions through the game’s feedback form on the results screen, or visit the creator’s website.