KöMaL 2018 K579
We form 100 pairs out of 105 girls and 95 boys in a random way. The boy-and-boy pairs shake hands, the girl-and-girl pairs give each other a hug, and the mixed pairs start to dance. Show that the number of handshakes taking place is 5 less than the number of hugs.
Official text KöMaL. Quoted with source.
Solutions
No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.
Similar problems
These problems have the most words in common with this statement.