Water Jugs
Measure the exact amount — the Die Hard riddle
Water Jugs is the timeless measuring riddle — yes, the one from Die Hard. Using jugs of fixed sizes, hit an exact target amount by filling, emptying and pouring between them. Pure multi-step planning.
How to play
- You're given jugs of set capacities and a target amount.
- Fill, empty, or pour between jugs (or, in decant mode, only pour).
- Get any single jug to hold exactly the target.
- Fewer moves scores higher — undo and reset are free.
What it trains
Multi-step logical planning and working memory — the logic domain, where Apexwit players' in-game scores rise by up to +113%. Explore Logic training →
Improvement figures are observed in-app score gains, backed by peer-reviewed cognitive-training research.
Difficulty
More jugs, awkward capacities and pour-only variants raise the planning depth.
Related Logic games
Free to play · No signup required · Works on web, iOS & Android
Want to save your progress across devices? Create a free account →Frequently asked questions
Is Water Jugs free to play?
Yes — Water Jugs is completely free on Apexwit, with every difficulty level unlocked, no ads and no signup required. An optional subscription only adds cloud backup so your scores and streaks sync across devices.
Do I need an account to play Water Jugs?
No. You can play Water Jugs instantly on the web or in the iOS and Android apps — no signup needed. You only create an account if you want to back up and sync your progress across devices.
What does Water Jugs train?
Multi-step logical planning and working memory — the logic domain, where Apexwit players' in-game scores rise by up to +113%.
What devices can I play Water Jugs on?
Apexwit runs in any modern web browser and as an app on iOS and Android, so you can play Water Jugs on a computer, phone or tablet — and pick up where you left off when you sync your progress.