Olimpiadas Matemáticas para niños de 13 años. Problema de las cinco cifras

Join my Discord channel to ask questions.   / discord   Visit my website: http://www.TodoSobresaliente.com for more Physics, Chemistry, and Math resources. The problem statement is as follows: What is the sum of all five-digit numbers that can be formed using 1, 2, 3, 4, and 5? Chapters: Introduction and Statement: 00:00 How many numbers are there?: 1:50 Method 1, Brute Force: 6:30 Method 2, Vertical Addition: 6:59 Method 3, Gauss's Formula: 13:27 If you would like to support my work, you can make a donation at https://www.paypal.com/cgi-bin/webscr...