2017 AIME II真题及答案解析
2017 AIME II真题 答案解析请参考文末 Problem 1 Find the number of subsets of that are subsets of neither nor . Problem 2 Teams , , , and are in the playoffs. In the semifinal matches, plays ,...
2017 AIME I真题及答案解析
2017 AIME I真题 答案解析请参考文末 Problem 1 Fifteen distinct points are designated on : the 3 vertices , , and ; other points on side ; other points on side ; and other points on side . Find the n...
2009AMC12B真题及答案解析
2009AMC12B真题 答案解析请参考文末 Problem 1 Each morning of her five-day workweek, Jane bought either a -cent muffin or a -cent bagel. Her total cost for the week was a whole number of dollars. How...
2009AMC12A真题及答案解析
2009AMC12A真题 答案解析请参考文末 Problem 1 Kim's flight took off from Newark at 10:34 AM and landed in Miami at 1:18 PM. Both cities are in the same time zone. If her flight took hours and minutes...
2010AMC12B真题及答案解析
2010AMC12B真题 答案解析请参考文末 Problem 1 Makarla attended two meetings during her -hour work day. The first meeting took minutes and the second meeting took twice as long. What percent of her wo...
2010AMC12A真题及答案解析
2010AMC12A真题 答案解析请参考文末 Problem 1 What is ? Problem 2 A ferry boat shuttles tourists to an island every hour starting at 10 AM until its last trip, which starts at 3 PM. One day th...
2011AMC12B真题及答案解析
2011 AMC12B 真题 答案解析请参考文末 Problem 1 What is Problem 2 Josanna's test scores to date are , , , , and . Her goal is to raise her test average at least points with her next test. What...
2011AMC12A真题及答案解析
2011 AMC12 A 真题 答案解析请参考文末 Problem 1 A cell phone plan costs dollars each month, plus cents per text message sent, plus cents for each minute used over hours. In January Michelle sent tex...
2012AMC12B真题及答案解析
2012 AMC12B 真题 答案解析请参考文末 Problem 1 Each third-grade classroom at Pearl Creek Elementary has 18 students and 2 pet rabbits. How many more students than rabbits are there in all 4 of the t...
2012AMC12A真题及答案解析
2012 AMC12A 真题 答案解析请参考文末 Problem 1 A bug crawls along a number line, starting at . It crawls to , then turns around and crawls to . How many units does the bug crawl altogether? P...
2013AMC12B真题及答案解析
2013 AMC12B 真题 答案解析请参考文末 Problem 1 On a particular January day, the high temperature in Lincoln, Nebraska, was degrees higher than the low temperature, and the average of the high and lo...
2013AMC12A真题及答案解析
2013 AMC12A 真题 答案解析请参考文末 Problem 1 Square has side length . Point is on , and the area of is . What is ? Problem 2 A softball team played ten games, scoring , and runs. They lost by one ...
