紫色彗星数学竞赛真题（2010年初中组）
PURPLE COMET MATH MEET April 2010 MIDDLE SCHOOL - PROBLEMS © Copyright Titu Andreescu and Jonathan Kane Problem 1 If 125 + n + 135 + 2n + 145 = 900, find n. Problem 2 Three boxes each contain four ...
2019-2020 BPHO英国物理奥赛第一轮第一部分真题及解析
BPhO Round 1 Section 1 15th November 2019 This question paper must not be taken out of the exam room Instructions Time: 1 hour 20 minutes for this section. Questions: Students may attempt any parts...
紫色彗星数学竞赛真题（2009年初中组）
PURPLE COMET MATH MEET April 2009 MIDDLE SCHOOL - PROBLEMS ©opyright Titu Andreescu and Jonathan Kane Problem 1 The pentagon below has three right angles. Find its area. Problem 2 Let p1 = 2, p2 = ...
2018-2019 BPHO英国物理奥赛第一轮第二部分真题及解析
British Physics Olympiad 2018-19 BPhO Round 1 Section 2 16th November 2018 This question paper must not be taken out of the exam room Instructions Time: 5 minutes reading time (NO writing) and 1 ho...
紫色彗星数学竞赛真题（2008年初中组）
PURPLE COMET MATH MEET– April 2008 MIDDLE SCHOOL – PROBLEMS © Copyright Titu Andreescu and Jonathan Kane Problem 1 Find the greatest prime factor of the sum of the two largest two-digit prim...
2018-2019 BPHO英国物理奥赛第一轮第一部分真题及解析
British Physics Olympiad 2018-19 BPhO Round 1 Section 1 16th November 2018 This question paper must not be taken out of the exam room Instructions Time: 1 hour 20 minutes for this section. Question...
紫色彗星数学竞赛真题（2007年初中组）
PURPLE COMET MATH MEET– April 2007 MIDDLE SCHOOL – PROBLEMS © Copyright Titu Andreescu and Jonathan Kane Problem 1 Last Sunday at noon the date on the calendar was 15 (April 15, 2007). What will be...
紫色彗星数学竞赛真题（2006年初中组）
UW-Whitewater / UT-Dallas Mathematics Meet – April 2006 MIDDLE SCHOOL © Copyright Titu Andreescu and Jonathan Kane Problem 1 Michael is celebrating his fifteenth birthday today. How many Sundays ha...
紫色彗星数学竞赛真题（2005年初中组）
UW-Whitewater / UT-Dallas Mathematics Meet – April 14, 2005 – MIDDLE SCHOOL © Copyright Titu Andreescu and Jonathan Kane Problem 1 A cubic inch of the newly discovered material madelbromium weighs ...
