News and Resources for Competitive and Advanced Mental Calculation
The 17th edition of the Junior Mental Calculation World Championship was held in Bielefeld, 04–07 September, as organized by Caroline Merkel since 2008 [official JMCWC website]. 99 competitors from Algeria, Bosnia, Bulgaria, Czechia, Egypt, France, Germany, India, Japan, Lebanon, Mexico, Panama, Serbia, Turkmenistan and the UAE qualified and attended—some for their first time, while others … Read more
Registration has just opened for the Junior Mental Calculation World Championship 2026! Since 2008 this international championship in mental calculation has taken place. Caroline Merkel and the team welcome all young people around the globe aged up to 19 to participate, challenge themselves, and develop their skills. I attended the last 6 events as an … Read more
The Junior Mental Calculation World Championship returned to Bielefeld, 04–06 October, as organized by Caroline Merkel since 2008 [official JMCWC website]. Around 80 competitors from Algeria, Bulgaria, the Czech Republic, Egypt, Germany, Hungary, India, Japan, Mexico, Panama, Qatar, Serbia, South Africa, Turkmenistan and the UAE qualified and attended—some for their first time, while others have … Read more
After the success of last year’s event, the Global Mental Math Olympiad (GMMO) will return on 01–02 November 2025 in Dubai. It is organized by LiveMCL, who also run the Mental Math World Cup (online) each Summer. This event is open to participants aged 6+ in three categories: Challenger (ages 6–8) Master (ages 9–11) Grandmaster (ages … Read more
Season 2 of the GMCA’s Mental Calculation League (official website) has concluded, with 25 competitors in the main event, and around 100 head-to-head matches held over several months. This was an online event open to all ages, allowing participation worldwide. Qualified contestants competed against each other in head-to-head matches in groups of 6. The top … Read more
The Mental Calculations World Championship (online) 2025 (hosted by the Mind Sports Olympiad as part of their Grand Prix) has just finished, and we have the winners! Out of nearly 100 entrants, 23 people from 8 countries qualified to this semi-final (Saturday 22nd February), and the top competitors were invited to the final (Sunday 13th … Read more
Registration is open for the Junior Mental Calculation World Championship 2025! Since 2008 this international championship in mental calculation has taken place. Caroline Merkel and the team welcome all young people around the globe aged up to 19 to participate and challenge their skills. I attended the 2018–2024 events as an official trainer, and I’ll be there … Read more
Update January 2025: registration link is now available on the MSO site. The first mental calculation competition of the year 45² is now confirmed: the Mind Sports Olympiad will once again host their online event this Spring as the Mental Calculations World Championship! This will be a part of their Grand Prix, which includes over 100 … Read more
Memoriad 2024 took place 06–10 November in the UAE (official website), following the previous events in 2008, 2012 and 2016. It is an international competition of memory and mental calculation. Each competitor could choose a selection of events from the 12 events available. Although the event was announced publicly only 2 months beforehand, 121 competitors … Read more
The Junior Mental Calculation World Championship returned to Bielefeld, 21–23 September, as organized by Caroline Merkel since 2008 [official JMCWC website]. 84 competitors from Algeria, Bulgaria, Canada, the Czech Republic, Germany, Hungary, India, Japan, Kyrgyzstan, Mexico, Qatar, Serbia, South Africa and the UAE qualified and attended—some for their first time, while others have attended for … Read more