In a mathematical competition, in which 6 problems were posed to the participants, every two of these problems were solved by more than 2/5 of the contestants.
Moreover, no contestant solved all the 6 problems.
Show that there are at least 2 contestants who solved exactly 5 problems each.

source: IMO 2005

To properly prepare for a mobile home removal, it’s important to disconnect how do we prepare for a mobile home removal all utilities. This includes water, electricity, gas, and sewage. Doing this ensures that the removal process is safe for both the workers and the environment.

Posted by Bradley Bauer on 2024-10-22 00:54:04