junior mental calculation


Dear friends!


This year 2020 does show our world in a really worth situation due to COVID-19.

No one of us can estimate when this crisis will be over.


We already talked to many of our participants all over the world (India, Marocco, Southafrica, ...). It seems that for a lot of our participants it will not be possible to organize an approved visa or book a reliable flight. Also our accomodations and city tours are cancelled.


Our event was from its first start 2008 not only valid for its high quality in mental calculation, even more for a global come together and to build friendships across any border.

This is what our event stands for.


The situation is now: The JMCWC 2020 is postponed to summer 2021!!




2020 JMC-OC, september 2020 online

See seperate tab  ...




2020 Learn more - Willem Bouman's new book


Willem Bouman wrote a new fabulous book about mental calculation! Read the book and learn more ... !




2021 JMCWC, summer 2021 in Bielefeld, Germany


The next Junior Mental Calculation World Championship in Germany. The team of famous international Mental Calculators has the great pleasure to invite you to participate in the competition.

Do you like Mental Calculation? Do you feel like showing what you can do in Mental Calculation? 
Then this is the right event for you!
You will find all necessary information concerning registration, organisation and participation as well as further relevant information on this website.
We will do our best to prepare a just and fair competition and to make your stay pleasant.

Please check out the homepage for news and updates!

We look forward to welcoming you!

Die nächste Junioren Weltmeisterschaft im Kopfrechnen in Deutschland, statt. Ein Team bekannter und erfolgreicher internationaler Kopfrechner lädt Euch zur Teilnahme ein.

Du magst Kopfrechnen? Du möchtest zeigen, wie gut Du im Kopfrechnen bist? Dann ist dieser Wettbewerb die richtige Veranstaltung für Dich!
Auf dieser Website findest Du alle wichtigen Hinweise zur Anmeldung, zum Ablauf und zur Teilnahme.
Wir organisieren gerne für Euch eine tolle und faire Meisterschaft.

Bitte beachte die neusten Informationen und Updates auf dieser Homepage!

Wir freuen uns auf Deine Teilnahme!


Caroline Merkel

Daniel Timms

George Lane

Willem Bouman

Elke Kuge

Max Weber

Martin Drees

Daniela und Anni Wollmann

Jürgen und Melina Loy


Thanks to that team !


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junior mental calculation world championship