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2006年10月原始机经讨论稿(10.01更新) 总结作者:violetmoon925/香水爱百合 郑重声明:欢迎转贴,但转贴请于醒目位置 注明此机经总结来源于:www.ChaseDream.com The information disclosed herein is collected from the Internet and Chasedream.com is not responsible for the integrity and reliability. The document may be freely distributed, provided the original information is not modified and the chasedream.com is titled as collector of the information.
2006年10月原始JJ总结从10月1日开始,截止于10月31日
鉴于换题库时间的不确定性,请各位参看2006年9月JJ和2005年10月JJ
【建议】: 强烈建议大家在讨论稿中讨论数学JJ,在总结帖后面讨论的话可能很多NN都注意不到,而且也不便于查阅,希望大家配合 有很多不全的题目其实是以前的老题,我个人力量有限,请大家帮忙一起补充,这样可以看出这个月那些题是常常考的,上了考场就可以节省很多时间! 凡是我提亮的地方,代表是trick题,如急考试的兄弟姐妹们没有时间,可以直接看trick题,其他可忽略! 总结作者:violetmoon925/香水爱百合 郑重声明:欢迎转贴,但转贴请于醒目位置 注明此机经总结来源于:www.ChaseDream.com The information disclosed herein is collected from the Internet and Chasedream.com is not responsible for the integrity and reliability. The document may be freely distributed, provided the original information is not modified and the chasedream.com is titled as collector of the information.
2006年10月原始JJ总结从10月1日开始,截止于10月31日
鉴于换题库时间的不确定性,请各位参看2006年9月JJ和2005年10月JJ
【建议】: 强烈建议大家在讨论稿中讨论数学JJ,在总结帖后面讨论的话可能很多NN都注意不到,而且也不便于查阅,希望大家配合 有很多不全的题目其实是以前的老题,我个人力量有限,请大家帮忙一起补充,这样可以看出这个月那些题是常常考的,上了考场就可以节省很多时间! 凡是我提亮的地方,代表是trick题,如急考试的兄弟姐妹们没有时间,可以直接看trick题,其他可忽略! 总结作者:violetmoon925/香水爱百合 郑重声明:欢迎转贴,但转贴请于醒目位置 注明此机经总结来源于:www.ChaseDream.com The information disclosed herein is collected from the Internet and Chasedream.com is not responsible for the integrity and reliability. The document may be freely distributed, provided the original information is not modified and the chasedream.com is titled as collector of the information.
2006年10月原始JJ总结从10月1日开始,截止于10月31日
鉴于换题库时间的不确定性,请各位参看2006年9月JJ和2005年10月JJ
【建议】: 强烈建议大家在讨论稿中讨论数学JJ,在总结帖后面讨论的话可能很多NN都注意不到,而且也不便于查阅,希望大家配合 有很多不全的题目其实是以前的老题,我个人力量有限,请大家帮忙一起补充,这样可以看出这个月那些题是常常考的,上了考场就可以节省很多时间! 凡是我提亮的地方,代表是trick题,如急考试的兄弟姐妹们没有时间,可以直接看trick题,其他可忽略! 讨论稿: 1.就是那題集合題, 3個啥東東的我忘了, 然後這三個東西的每一樣都有人選(數字忘了)...選三樣的好像有一人, 請問只選兩樣的有多少人, (是九月JJ的變形題一个班90个鬼子选课,每人至少选一门,选A的有60,B的40,C的20,三门都选的5个,问只选两门的几个?) 讨论:请参见9月jj 2.另外還有一題..一家公司, 有拿business degree 的佔40%, 講法文的佔80%. 員工結構是, 要嘛會講法文, 要嘛有business degree, 要不就是兩者兼具, 求兩者兼具佔多少. 這題我覺得應該簡單, 我算出來是20%, 可是沒這選項.....害我慌張的很, 然後就開始琢磨最後要問的問題. 可能是頭暈, 我一直看不出來, 最後只好猜題目是要問拿business degree的有多少比例是講法文, 所以我猜50%... 請大家自行斟酌阿...(汗) 讨论:按照作者题意的理解,作者的答案应该是对的啊。Total= B+ F- BF + None. 讨论中 3.有一題幾何圖, 長的很怪, 我算不出來面積... AB=BC=8, CD=2, B和C都是直角, AE=ED=13, 求他們的面積(我有畫圖, 可是不知如何upload...) 
讨论:连接AD,求梯形ABCD和三角形ADE的面积。梯形ABCD=(2+8)*8/2=40. 三角形ADE的面积求法是: 底边AD=根号下(8-2)^2+(8)^2=10. 由E向AD引垂线,垂足为O,那么,OD=5, ED=13, 所以,OE=12, 因此,三角形ADE=12*10/2=60。 所以,五边形ABCDE的面积=40+60=100 DS 4. 有遇到一題 有圖 ,圖為 八乘八的像棋盤的正方形,圖中標明M、N兩點 ,問N的座標? 條件一是M的座標(好像是(4、6)) 條件二是M比N高??個單位 讨论:没有图,题目不全
PS 5.XY原料混在一起,XY的混和物需要1.5克的X和6.5克的Y,XY原料??克賣??元,兩個原料的成本在混和原料中佔同樣的比例.....問X原料多少每克多少錢? 讨论:简单题。根据各原料成本在混合原料成本中所占的比例以及混合原料的价格,算出1.5g的X的成本。然后就可以求出每克的价钱 6. 有经济问题。关于功率。 讨论:题目不全 7. (2)^-2/(1/2)^-3 讨论:(1/4)/(8)=1/32 8.Working alone, a small pump takes twice as long as a large pump takes to fill an empty tank. Working together at their respective constant rates, the pumps can fill the tank in 6 hours. How many hours will it take the small pump to fill the tank working alone? 讨论:设小泵用X小时,那么,大泵用X/2小时。1/[(1/x)+(1/2x)]=6, X=9 9. What is the total number of different 5-digit numbers that contain all of the digits 2, 3, 4, 7, and 9 and in which none of the odd digits occur next to each other? 讨论:满足条件的话,那么2,4两个数只能在2,4位。 那么,C31*C21*C21=12 10. One integer will be selected randomly from the integers 11 to 60, inclusive. What is the probability that the selected integer will be a perfect square or a perfect cube? 讨论:11-60中的完全平方数和完全立方数是:16,25,27,36,49。那么,概率就是5/50=0.1 11. 5 people are to be seated around a circular table. Two seating arrangements are considered different only when the positions of the people are different relative to each other. What is the total number of different possible seating arrangements for the group? 讨论: 12. The subset of [x, y, z] is x, y, z, xy, xz, yz, xyz. How many subsets of [x, y, z, w] contain w? 讨论:相当于有多少组合中含有W。1+C31+C32+C33=8 13. A three-digit code consists of digits from 0 to 9. If the first digit cannot be 0 or 1, the second digit must be 0 or 1, and the second and third digits cannot be 0 at the same time, how many codes are possible? 讨论:我分了两种情况:1. 第二位是0。C81*C91=72, 2. 第二位是1。C81*C10,1=80. Total=80+72=152 14. A jar contains 12 balls, including three red and nine blue; another jar contains 20 balls, including eight red and 12 blue. If one ball is selected from each of the two bags, what is the probability that two blue balls will be selected? 讨论:(C91*C12,1)/(C12,1*C20,1)=9/20 15. What is the remainder when positive integer x is divided by 7 1). X+1 is divisible by 7 2). X+13 is divisible by 7 讨论:条件1:X+1=7a, X=7a-1, 可知,余数为1。条件2:X+13=7a, X=7a-13, 可知,余数为6。所以,D 16. A company has assigned a distinct 3-digit code number to each of its 330 employees. Each code number was formed from the digits 2, 3, 4, 5, 6, 7, 8, 9 and no digit appears more than once in any one code number. How many unassigned code numbers are there? 讨论:C81*C71*C61-330=6 17. K=wxyz, where w, x, y, z are prime numbers. Not including 1 and K, how many factors does K have? 讨论:4+C42+C43=14 18. Each of the 30 boxes in a certain shipment weighs either 10 pounds or 20 pounds, and average (arithmetic mean) weight of the boxes in the shipment is 18 pounds. If the average weight of the boxes in the shipment is to be reduced to 14 pounds by removing some of the 20-pound boxes, how many 20-pound boxes must be removed? 讨论:设需要移走X个。30*18-14*(30-x)=20x, x=20 19.补充一道: Q. In which quadrants do the roots of the equation lie, given x and y are integers: Y = (x-2)^2 -1 Y = (x-2)^2 -1 Y=x^2+4-4x-1 Y=x^2-4x+3 Y=(x-1)(x-3) so, either x=y+1 or x=y+3 we can't determine what quadrant exactly x and y lie, so the answer would be E 讨论:?
[此贴子已经被作者于2006-10-10 17:02:36编辑过] |