⚡ Flash Anzan Challenge
Numbers flash on the screen. Add them in your head and type the total.
Every correct answer moves you up a level. You have 3 lives.
Find your level in one minute!
No sign-up. Your best score stays on this device only.
What is flash anzan?
Numbers appear one at a time and vanish. You picture the soroban (Japanese abacus) beads in your head and keep a running total. Abacus schools around the world use it to train mental calculation. The speed and length in this game follow Soroban Kingdom's level table (20th Kyu: two 1-digit numbers at 1.5 s each, up to 10th Dan: fifteen 3-digit numbers at 0.3 s).
Want to practice more?
Soroban Kingdom has addition and subtraction on the abacus, multiplication, division and mental math for every level. Levels 20–16 are free forever — no sign-up. See also the level guide.