THE NUMBERS OF 10 SEPTEMBER
Day 40 · Thursday, 10 September 2026 · 4 puzzles, the same for every player
KATANA 💀💀
the boss of that day
the boss of that day
ROUND 1
8 · 6 · 4 · 3 → target 15
One possible solution
4 + 3 = 7
8 + 7 = 15
ROUND 2
2 · 8 · 6 · 15 → target 58
One possible solution
15 + 8 = 23
23 + 6 = 29
29 × 2 = 58
ROUND 3
50 · 8 · 5 · 4 · 9 · 7 → target 371
One possible solution
50 - 8 = 42
42 × 9 = 378
378 - 7 = 371
ROUND 4
50 · 100 · 4 · 6 · 3 · 9 → target 712
One possible solution
9 × 3 = 27
100 + 27 = 127
127 × 6 = 762
762 - 50 = 712
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.