- Rinne Tsujikubo
- 1.62 second(s)
- Japan (Saitama)
The fastest mental arithmetic (15 sets of three-digit numbers) – Flash Anzan™ is 1.62 seconds and was achieved by Rinne Tsujikubo (Japan) by correctly adding 15 sets of three-digit numbers flashed on the screen in Saitama, Saitama, Japan, on 17 January 2023.
Anzan skill is in performing mental calculations using an imaginary abacus. Rinne has attempted this title because she won the annual Flash Anzan Challenge Cup, which earned her the right to challenge this Guinness World Records title.