Play it · Ages 9–10
Eight Coins, One Light
Two weighings. That is all you get. One hundred challenges — a school year of them. Three are the year’s Hard Thing, at 33, 66 and 100. The rest are reps: same kind of question, new content every time. Nothing is timed and nothing is scored.
0/100
Find every pairPairs making 8
Tap two numbers that add to 8. Find every pair.
Go in order and you will know when you are done.
Pairs making 8
Tap two numbers that add to 8.
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.