Others events If you have event information that is mental math related, please write to us with your event details as early as possible so that we can post your events here. 2009 World City Cup - Abacus, Mental Arithmetic & Mathematics Competition
2009 International Mental Arithmetic Invitational Competition
2009 World Association of Abacus and Mental Arithmetic: Mental Arithmetic Competition
2009 Pan Pacific Abacus & Mental Arithmetic Competition
Mental Calculation World Cup
World Math Day
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