Turning over coins - Lycée Val de Durance (Pertuis)

Turning over coins - Lycée Val de Durance (Pertuis)

Établissement
Lycée Val de Durance (Pertuis)
Année
2022-2023
Résumé
We have a certain number of stacked coins. A stack of coins can be turned over partly, but only by starting from the top of the stack. How many times do you have to repeat this operation to get all the coins on the front side? How should we proceed in general?
https://padlet.com/proalh/txojjc60gtfmglu3