For the bases 2,3,5 and 10 we have produced numeral coins that allow to represent all numbers up to 100.
Moreover, we have made an interactive website to play with numeral coins.
-
The interactive website (free, without advertisement, without data collection) is a collaboration with Imaginary (joint work with Daniel Ramos) and it is available here:
https://imaginary.github.io/numeral-coins/dist/
- The .stl files (ready for 3D print) and the printing instructions can be downloaded: zip.
- An article (joint with Paul Deutsch and Dany Leal Cordeiro) on The Wallet Problem: link.
CONTACT: antonella.perucca@uni.lu
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International license CC BY-NC-SA 4.0.
The stl files (produced by Dominique Breton) and the app (produced by Imaginary gGmbH) are a courtesy of the University of Luxembourg.
Many thanks to Fabio Génin for useful comments on the first version of the app.