vasista started the topic India Regional Mathematical Olympiad 1990 in the forum India Regional Mathematical Olympiad 2 weeks, 6 days ago
India Regional Mathematical Olympiad 1990
Problem 1
Two boxes contain between them 65 balls of several different sizes. Each ball is white, black, red or yellow. If you take any five balls of the same colour, at least two of them will always be of the same size(radius). Prove that there are at least three ball which lie in the same box have the…[Read more]