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Cogs

Fraction ratios · 30 levels

Mount gears so the flag turns exactly right.

How to play

  1. Tap a gear in the tray, then tap an empty axle to mount it. Tap a mounted gear to take it back.
  2. The motor turns once ↻. Each mesh turns the next gear driver teeth ÷ driven teeth times as far, and flips its direction.
  3. Fill every axle so the 🏁 flag gear turns exactly the target amount, the right way round.

A single gear in the middle only passes the turn along. Double gears (big + small on one axle) are what change the speed.

Open Cogs

Teeter, Tint and Echo Heist are free starters. Other games unlock through earned game choices or permanent packs. Your progress stays in the browser; optional sign-in saves it to your website account.