6 Random Saint Nicholas House Drawing – Mathekalender https://www.mathekalender.de/wp/calendar/challenges/2025-06-en/
At this point, the mathematician elf Uhur has had enough and replies with one of
Dein Suchergebnis zum Thema: elfen
Meintest du elsen?
9 The Elves on the Elevator – Mathekalender https://www.mathekalender.de/wp/calendar/challenges/2025-09-en/
Each elf presses exactly one of the buttons 1,2,\ldots,10 (uniformly at random) with
19 An Intertwined Issue – Mathekalender https://www.mathekalender.de/wp/calendar/challenges/2024-19-en/
Only equipped with a small flashlight, the eager elf Eifi wanted to clean the attic
3 A Colorful Christmas – Mathekalender https://www.mathekalender.de/wp/calendar/challenges/2025-03-en/
MATH+ Author: Hajo Broersma Project: 4TU.AMI Challenge Mondrian the painter-elf
3 Farbenfrohe Weihnachten – Mathekalender https://www.mathekalender.de/wp/de/kalender/aufgaben/2025-03-de/
Ivana Martić, MATH+ Autor: Hajo Broersma Projekt: 4TU.AMI Aufgabe Der Maler-Elf
18 Christmas Cards – Mathekalender https://www.mathekalender.de/wp/calendar/challenges/2024-18-en/
walk along the path making only right turns, and “vertices” means points where the elf