8 一张学校戏剧票要花美元,其中是整数。一组九年级学生买的票总共花了美元,一组十 年级学生买的票总共花了6美元。问x有少个可能的值? 1 2010AMC12B Problem AmonthwithdayshasthesamenumberofMondaysandWednesdays.Howmanyoftheseven daysoftheweekcouldbethefirstdayofthismonth?
Solution We find the area of the big rectangle to be , and the area of the smaller rectangle to be . The answer is then . See also 2010 AMC 12B (Problems • Answer Key • Resources (/Forum/resources.php?c 182cid 44year 2010)) Preceded by Followed by Problem 1 Problem 3 ...
8 2016AMC10B 2016AMC10BAnswerKey 12345678910111213 DBDBDBCACDBDD 141516171819202122232425 DCEDEDCBACDA 9 2017AMC10B 2017AMC10B Problem1 Marythoughtofapositivetwo-digitnumber.Shemultiplieditbyandadded.Thenshe switchedthedigitsoftheresult,obtaininganumberbetweenand,inclusive.WhatwasMarys ...
amc2019-answerkeyFinal澳大利亚数学竞赛 (AMC)真题与答案 MP 1: D 2: B 3: C 4: C 5: E 6: A 7: B 8: C 9: D 10: A 11: E 12: D 13: B 14: E 15: E 16: B 17: E 18: C 19: B 20: C 21: A 22: A 23: C 24: D 25: C 26: 390 27: 234 28: 162 29: 224...
AMC10AAnswerKey1 2 3 4 5 6 7 8 9 10B A E E D B E C E A11 12 13 14 15 16 17 18 19 20E C D A D D C D E B21 22 23 24 25 E D D D D
Problem 8 答案:E Solution 1:You can see that we can create a “stack” of 5 triangles congruent to the 7 small triangles shown here, arranged in a row above those 7, whose total area would be 5. Similarly, we can create another row of 3, and finally 1 more at the top, as follo...
设想由单位正方形所构成之大正方形,右图所示为其中的一部分,围绕 中心黑色正方形的第一圈共有 8 个单位正方形,第二圈共有 16 个单位正 方形,依此类推,第 100 圈中的单位正方形的个数为 。 (A) 396 (B) 404 (C) 800 (D) 10,000 (E) 10,404 12. 设 n 为三个连续整数的乘积且 n 可被 7 ...
8 2013AMC10BAnswerKey 9 2013AMC10BProblems/Problem16 Problem Intriangle,mediansandintersectat,,,and.Whatisthe areaof? Solution Solution1 Letususemasspoints:Assignmass.Thus,becauseisthemidpointof,alsohasamassof. Similarly,hasamassof.andeachhaveamassofbecausetheyarebetweenandandand ...
设想由单位正方形所构成之大正方形,右图所示为其中的一部分,围绕 中心黑色正方形的第一圈共有 8 个单位正方形,第二圈共有 16 个单位正 方形,依此类推,第 100 圈中的单位正方形的个数为 。 (A) 396 (B) 404 (C) 800 (D) 10,000 (E) 10,404 12. 设 n 为三个连续整数的乘积且 n 可...
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