... Questions of Hanoi Open Mathematical Olympiad 1.1 Hanoi Open Mathematical Olympiad 2006 1.1.1 Junior Section, Sunday, April 2006 1.1.2 Senior Section, Sunday, April 2006 1.2 Hanoi Open Mathematical ... = abcd be the 4-digit prime number Prove that the equation ax3 + bx2 + cx + d = has no rational roots 10 1.3 Hanoi Open Mathematical Olympiad 2008 1.3 Hanoi Open Mathematical Olympiad 2008 1.3.1 ... 3 5 10 10 11 12 12 14 Questions of Hanoi Open Mathematical Olympiad 1.1 Hanoi Open Mathematical Olympiad 2006 1.1.1 Junior Section, Sunday, April 2006 Q1 What is...