THE NUMBERS OF 21 SEPTEMBER
Day 51 · Monday, 21 September 2026 · 4 puzzles, the same for every player
ROUPILLON 💀
the boss of that day
the boss of that day
ROUND 1
6 · 1 · 8 · 7 → target 16
One possible solution
7 + 1 = 8
8 + 8 = 16
ROUND 2
8 · 9 · 6 · 20 → target 31
One possible solution
9 - 6 = 3
20 + 8 = 28
28 + 3 = 31
ROUND 3
25 · 2 · 10 · 1 · 4 · 8 → target 214
One possible solution
25 × 8 = 200
200 + 4 = 204
204 + 10 = 214
ROUND 4
50 · 5 · 3 · 4 · 2 · 8 → target 388
One possible solution
50 × 8 = 400
4 × 3 = 12
400 - 12 = 388
Abako Daily is a free mental maths game: six numbers, one target to hit exactly with the four operations, each number used once — the same idea as the numbers round on Countdown, or NYT Digits, but as a daily. Four draws a day, identical for everyone, with no timer, no account and no ads. The solutions above are one possible route — there is almost always more than one, and comparing yours is half the fun.