Play it · Ages 7–8
The Broken Ruler
The zero is gone. Measure anyway. 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
Set the two ends of the pencil so it measures exactly 9 cm.
The ruler starts at 4. There is no zero to line up with.
Nine centimetres
The ruler snapped at 4. Tap one end of the pencil, then the other.
Nothing placed yet
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.