Play it · Ages 11–12
Three Doors
Swap, or stay? Three challenges — each one changes what you have to do, not just how many of it there are. Nothing is timed and nothing is scored.
0 of 3 solved
Play ten rounds however you like. Watch the tally.
Ten rounds is not enough to be sure. That is worth feeling.
Ten rounds
- Swapped
- 0 / 0
- —
- Stayed
- 0 / 0
- —
0 / 10 rounds
Ten minutes of stuck counts as the work.
Now do it away from the screen
The board is the warm-up. The year page has the same problem on paper, the hint ladder, the answer, the five-day week and three questions nobody can mark — which is where the twenty-five minutes actually go.