Brain games & math games online

MindDuel is a site for quick math and logic games. You play right in your browser – no download and no sign-up: straight away as a guest, on your own against the computer or in a duel against others.

The name says it all: Mind Duel – a duel of minds. Here you’ll find brain games: math games and two-player board games.

Math puzzles and mental math

• make24: Combine all the numbers into a single one — and it has to be 24.
• nullify: Combine all the numbers into a single one — and it has to be 0.
• sortRace: Put the row in the required order — the match tells you which.
• estimateRace: Seven calculations, four rounded numbers each — round, work it out in your head, tap the closest.

Two-player board games

• twiceFour: Two lines of four win the round – you only slide, and every line counts once.
• burnTrail: Every step burns the point behind it – whoever can’t move loses.

In the first four, everyone plays on their own board, all with the same puzzle; in twiceFour and burnTrail you play on a shared board.

Play anywhere

On a computer, a tablet or a phone – anywhere with a current browser. With an account you play rated games, get into the leaderboard and challenge friends.

Questions, ideas or found a bug? Have a look at the FAQ or write to us using the contact form.