About us

Numericum is an interactive online course for mental math computations.

We have worked closely with academic experts and UX designers to develop a set of interactive exercises. These would teach you how to perform your calculations fast and effectively. 

Numericum Team

Michal Zwinger

Co-founder of Legentas, one of his first implemented online projects. Michal focuses on online business development.

Michal Hudeček

Co-founder of Legentas. Michal lectures at international conferences including the UNESCO, and frequently comments in the media about conceptual thinking. His company Maintop Businesses helps to start innovative online projects.

Jan Siuda

Co-founder of Numericum, who is also active in other web projects. He enjoys working with smart people and creating new things. In his free time he likes to ski or sail.

Jiří Rozehnal

Experienced math teacher. As a member of the MENSA Czech Republic is engaged in gifted children teaching program. His insights helped significantly to increase the quality of content at Numericum.

Marek Lisy

Student of MFF at Charles University, who loves smiling people, football, Kofola and good and crazy ideas. (Btw. he is a programmer)

Šimon Rozsíval

Legentas programmer and student of MFF at Charles University. Interested in web applications, nature, scouting and theater.

Adam Zlatohlávek

Progressive student. Interested in programming web services and mobile applications. When not programming, he likes reading books.

Veronika Pavlíková

One of the first members of the Legentas team. Veronika is our web and advertising graphic designer. Her hobbies include photography and travelling.


Contact us
What is the color of sky?


More team contact details here