100 schoolchildren, 4 tasks (II Soros Olympiad 1995-96 R2 9.4)
Source:
June 3, 2024
number theoryalgebra
Problem Statement
schoolchildren took part in the Mathematical Olympiad. tasks were proposed. The first problem was solved by people, the second by , the third by and the fourth by . However, no one solved all the problems. Students who solved both the third and fourth questions received an award. How many students were awarded?