2012年 AMC 10A真题含答案 201212012AMC 10A Problem 1 Cagney can frost a cupcake every seconds and Lacey can frost a cupcake every seconds.Working together,how many cupcakes can they frost in minutes?Cagney 每20秒可以给一个蛋糕上霜，Lacey 每30秒可以给一个蛋糕上霜，他俩合作5分钟内可以给多少个...
数学竞赛-2012年-AMC10-A卷.doc,2012 AMC 10A Problems Instructions This is a 25-question, multiple choice test. Each question is followed by answers marked A, B, C, D and E. Only one of these is correct. You will receive 6 points for each correct answer, 1
以大正方形中心为旋转中心顺时针转90后除将原来位置是黑色但旋转后变成白色的格子再涂成黑色外其它的格子颜色维持不变此时大正方形的所有格子都是黑色的机率是多少 第13 届 AMC 10A 1. 小华每 20 秒可以将一个蛋糕铺满糖霜, 小明每 30 秒可以将一个蛋糕铺满糖霜。 若他们一起工作,则 5 分钟他们共可将多少...
2010-2023年AMC10A真题汇编含答案(共15套) 热度: 201220122012AMCAMCAMC10A10A10AProblemsProblemsProblems InstructionsInstructionsInstructions 1.1.1.ThisThisThisisisisaaa25-question,25-question,25-question,multiplemultiplemultiplechoicechoicechoicetest.test.test.EachEachEachquestionquestionquestionisisisfollowedfollowed...
2012年-AMC10-A卷 中文翻译及答案.doc,第13届 AMC 10A 1. 小华每20秒可以将一个蛋糕铺满糖霜,小明每30秒可以将一个蛋糕铺满糖霜。若他们一起工作,则5分钟他们共可将多少个蛋糕铺满糖霜? (A) 10 (B) 15 (C) 20 (D) 25 (E) 30 2. 将一个边长为8的正方形平分成两个全等的长
( 2012 AMC 10A Problem, Question #11) Cagney can frost a cupcake every 20 seconds and Lacey can frost a cupcake every 30 seconds. Working together, how many cupcakes can they frost in 5 minutes?( )A. 10 B. 15 C. 20 D. 25 E. 30 相关知识点: ...
2012AMC10A真题与答案解析
先说上一题的解题思路,穷举非常耗时间,在竞赛中不可取,毕竟人脑不比电脑,写几行代码RUN一下就出来结果。按照之前说的两个方向,可以得到两种解法: 解法一,利用限制条件缩小枚举范围:设四个角最小的数字为n,则其他三个角最小必须为n+2,n+4,n+6,所以n+n+2+n+4+n+6小于等于18,n只能等于1,那么四个角的...
2012 AMC 10A Problems Instructions 1.This is a 25-question, multiple choice test. Each question is followed by answers marked A, B, C, D and E. Only one of these is correct. 2.You will receive 6 points for each correct answer, 1.5 points for each problem left unanswered, and 0 ...
2012 AMC 10A Problems/Problem 3 The following problem is from both the 2012 AMC 12A #1 and 2012 AMC 10A #3, so both problems redirect to this page. Problem A bug crawls along a number line, starting at . It crawls to , then turns around and crawls to . How many units does the bu...