快考试了，发现有几道数学题不会，希望大家帮忙~~

我知道有点多啦，但是希望好心人多多帮忙哈……你们都是大好人！嘿嘿~~

1,When positive integer x is divided by positive integer y, the remainder is 9.  If x/y = 96.12, what is the value of y?

                     A96

                     B75

                     C48

                     D 25

                     E12             答案B

2,  A photographer
    will arrange 6 people of 6 different heights for photograph by placing them in two rows of three so that each person in the first row is standing in front of someone in the second row.  The heights of the people within each row must increase from left to right, and each person in the second row must be taller than the person standing in front of him or her.  How many such arrangements of the 6 people are possible?
                

                  A5

                  B6

                  C9

                  D24

                  E36             答案 A  

3，Joanna bought only $0.15 stamps and $0.29 stamps.  How many $0.15 stamps did she buy?

(1)     She bought $4.40 worth of stamps.

(2)     She bought an equal number of $0.15 stamps and $0.29 stamps。       答案A

4,If p, s, and t are positive prime numbers, what is the value of p³s³t³ ?

(1)     p³st = 728
                        

(2)     t = 13                               答案A
                                

5,Each of 20 parents chose one of five days from Monday through Friday to attend parent-teacher conferences.  If more parents chose Monday than Tuesday, did at least one of the parents choose Friday?

(1)     None of the five days was chosen by more than 5 parents.

(2)     More parents chose Monday than Wednesday.                  答案A

6,A certain characteristic in a large population has a distribution that is symmetric about the mean m.  If 68 percent of the distribution lies within one standard deviation d of the mean, what percent of the distribution is less than m +
          d ?

                  A5

                  B6

                  C9

                  D24

                  E36             答案 A  

3，Joanna bought only $0.15 stamps and $0.29 stamps.  How many $0.15 stamps did she buy?

(1)     She bought $4.40 worth of stamps.

(2)     She bought an equal number of $0.15 stamps and $0.29 stamps。       答案A

4,If p, s, and t are positive prime numbers, what is the value of p³s³t³ ?

(1)     p³st = 728
            

(2)     t = 13                               答案A
                    

5,Each of 20 parents chose one of five days from Monday through Friday to attend parent-teacher conferences.  If more parents chose Monday than Tuesday, did at least one of the parents choose Friday?

(1)     None of the five days was chosen by more than 5 parents.

(2)     More parents chose Monday than Wednesday.                  答案A

6,A certain characteristic in a large population has a distribution that is symmetric about the mean m.  If 68 percent of the distribution lies within one standard deviation d of the mean, what percent of the distribution is less than m +
          d ?

                      B.     32%

                      C.     48%

                      D.    84%

                      E.     92%                     答案D(顺便说一句，能告诉我这题什么意思么~)

5,Each of 20 parents chose one of five days from Monday through Friday to attend parent-teacher conferences.  If more parents chose Monday than Tuesday, did at least one of the parents choose Friday?

(1)     None of the five days was chosen by more than 5 parents.

(2)     More parents chose Monday than Wednesday.                  答案A

6,A certain characteristic in a large population has a distribution that is symmetric about the mean m.  If 68 percent of the distribution lies within one standard deviation d of the mean, what percent of the distribution is less than m +
          d ?

                      B.     32%

                      C.     48%

                      D.    84%

                      E.     92%                     答案D(顺便说一句，能告诉我这题什么意思么~)

(2)     t = 13                               答案A
            

5,Each of 20 parents chose one of five days from Monday through Friday to attend parent-teacher conferences.  If more parents chose Monday than Tuesday, did at least one of the parents choose Friday?

(1)     None of the five days was chosen by more than 5 parents.

(2)     More parents chose Monday than Wednesday.                  答案A

6,A certain characteristic in a large population has a distribution that is symmetric about the mean m.  If 68 percent of the distribution lies within one standard deviation d of the mean, what percent of the distribution is less than m +
          d ?

                      B.     32%

                      C.     48%

                      D.    84%

                      E.     92%                     答案D(顺便说一句，能告诉我这题什么意思么~)

5,Each of 20 parents chose one of five days from Monday through Friday to attend parent-teacher conferences.  If more parents chose Monday than Tuesday, did at least one of the parents choose Friday?

(1)     None of the five days was chosen by more than 5 parents.

(2)     More parents chose Monday than Wednesday.                  答案A

6,A certain characteristic in a large population has a distribution that is symmetric about the mean m.  If 68 percent of the distribution lies within one standard deviation d of the mean, what percent of the distribution is less than m +
          d ?

                      B.     32%

                      C.     48%

                      D.    84%

                      E.     92%                     答案D(顺便说一句，能告诉我这题什么意思么~)

第一题设未知数：x=qy+9,然后算。

第二题，设五个人为ABCDEF,设最矮的人 是 A,最高的人是E，然后把中间的4个人排序，一共有5种可能。

第三题，选A，两种各买10个，才能凑出4.4

哦~ 好困，下次继续吧~

非常感谢~~呵呵！开始算喽！！