1. n个数从小到大排列,求/4,设商为i,余数为j ,则可求得1st Quartile为:/4+j/4
2. 4个,2个的排列方式 15
3 .5双袜子,同时去2只,刚好配对的概率。1/9
4. 40人说French,60人说Russian,80人说Italy,说两种语言的有50人,说三种语言的有 10人. 共有125人,问不说这些语言的有几人. Key:125-=15
5 .等腰直角三角形边长2加2倍根号2,求面积。
6. 某种溶液浓度为125gram per liter, 转换成 ounce per gallon,求表达式.已知 1 ounce=28.xxx gram and 1 gallon=3.875 liter
7. x,y,z 均方差为d, 求x+10,y+10,z+10的均方差
8. 1的概率是0.8,2的概率是0,6,问是1或是2或是both的概率,1-0.60.8=0.92.
9. 还有一组测量数据中,12.1比mean低1.5个标准差,17.5比mean高3.0个标准方差.问mean是多少.13.9
10. 图表题,1992年总和是50,96年是60,每年至少增长1,问最大的年增长:7.0
11 .x+y=52x+2y=8之间最短距离与1比较 1
12. 以40miles/hour速度经过一1.5miles的路,若超速则罚款fine=50+10,现一人用108秒通过此路,问她的fine=? key 150
13. xyz togather finish the task for 9 hour, xy togather need 12 hour,z alone needs ? hour. key 36
14. 直线l.在X轴截距是3,在Y轴截距是4。 直线m.在X轴截距是4,在X轴截距是3。 比两个直线的sloop. 注意都为负 ml
15. 从一堆6个什么东东里取4个共会有15种不同的可能,如果从8个里面取4个会比从6个里面取多多少种可能?我选的是55.这题有点怪,不知为什么它还要把15说出来。难道是我理解有误?
16 .一个表3分钟慢一秒钟,问慢3分钟要过多少分种?540分钟
17. 3/0.0001 与 3/0.000099 比大小
18. 在一个图表题里考到了median。这题比较不好做,还是罗马数字题。是有关选民选举的比例,两块饼饼统计图,一饼是参选人x,y的支持率,另一块是选民们的收入income 。从图中收入少于3000的选民有58% , 所以说选民收入median在收入少于3000的里面。
19. 有一题问下面这个数里能找出的最2的最大次方的factor 是多少?
指数可能不是这个了,不过意思是这个意思。
20. 1-10中选出两个数,可重复,问是都是偶数的概率。3/4
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