in the k-th month the weeks consist of 6^{k-1} days
Source: 2021 Dürer Math Competition Finals Day2 E1 https://artofproblemsolving.com/community/c2749870_2021_
January 8, 2022
algebra
Problem Statement
In Sixcountry there are months, but each month consists of weeks. The month are named the same way we do, from January to December, but in each month the weeks have different lengths. In the -th month the weeks consist of days. What is the number of days of the spring (March, April, May together)?