Olympiad Problems from all over the World 9th Grade Content Vol.5 - D.M. Batinetu-Giurgiu ♡ 16 73 LEI info ★ ★ ★ ★ ★ 3.37/5 The book contains 400 problems in algebra, number theory, combinatorics, and geometry, from all over the world. It is an excellent text for preparing mathematics
