××有几道数学题想提问，望高人指点

1. According to the directions on a can of frozen orange juice concentrate, 1 can of concentrate is to be mixed with 3 cans of water to make orange juice. How many  12-ounce cans of the concentrate are required to prepare 200 6-ounce servings of orange juice? (25, 34,50,67,100)

2. On July 1 last year, the total number of employees at company E was decreased by 10 percent. Without any change in the salarys of the remaining employees, the average employee salary was 10 percent more after the decrease in number ot employees than before the decrease. The total of the combined salaries ot all of the employees at company E after July 1 was what percent of that before July 1 last year?

(90%, 99%,100%, 101%, 110%)

3.what is the remainder when the positive interger x  is diided by 6?

(1)when X is divided by 2, remainder is 1; when X  is divided by 3, remainder is 0

(2)when x is divided by 12, the remainder is 3

4. x+y等于77， xy的积是多少？

（1）x=y+1   (2)x和y的十位数字相同

 5. A certain stock exchange designates each stock with a 0ne-, two-, three-letter code, where each letter is selected from the 26 letters of alphabat. If the letters may be repeated and if the same letters used in a different order consittute a different code, how many different stocks is possible to uniquely designate with these codes? (2951,8125,15600,16302,18278)

6. 一群学生在餐厅用餐，每个人either likes or dislikes lima beans，同时，每个学生不是喜欢就是不喜欢brussels sprouts, 这些学生中三分之二不喜欢lima beans, 而这三分之二的学生中有五分之三不喜欢brussels sprouts。问有多少人喜欢brussels sprouts但不喜欢lima beans? (答案是D)