Fastest Pour

Fastest Pour is a race-prediction game built on one delicious physics idea · time = path length ÷ speed. An apparatus of criss-crossing tubes runs from the top of the screen down to a finish line. At each inlet a liquid is poured in · water, juice, oil or honey · and each liquid flows at its own simple speed factor (water ×4, juice ×3, oil ×2, honey ×1), shown in the legend above the tubes.

Trace, weigh, commit. The tubes bend and cross on their way down, so they are not the same length · a fast liquid may be stuck with a long winding tube while a slow one gets a short straight drop. Trace each tube with your eyes, weigh its length against its liquid's speed, and tap the pour you think touches the bottom first. Then the race plays out: every liquid flows down its tube at its true rate, and the reveal shows the full math · each tube's length divided by its speed, ranked fastest to slowest.

Why it trains your brain. This is relative-speed reasoning · the same rate × time thinking behind "which car arrives first?" word problems, but judged visually before it is confirmed numerically. You practice estimating lengths along a winding path, holding two quantities in mind at once, and trading them off against each other. Easy races keep the speeds far apart; harder ones use neighbouring speed factors, more crossings and photo-finish margins.

Part of the PlayMemorize family of brain-training games. Runs entirely in your browser, works offline as a Progressive Web App.