Metashkola Olimpiada Po Matematike Zadaniia <HD 2026>

At a math circle meeting, 10 students met. If every student shook hands with every other student exactly once, how many handshakes were there in total?

Platforms like YouTube offer walkthroughs for similar Russian-style olympiad problems. metashkola olimpiada po matematike zadaniia

You have 9 identical-looking coins, but one is slightly lighter than the rest. Using a balance scale, what is the minimum number of weighings needed to guarantee finding the fake coin? Preparation Resources To prepare for the official rounds, students often use: At a math circle meeting, 10 students met