下面为大家整理的是SAT数学题目的练习，共7道，都是代数方面的题目，后面附有详细的答案解析。SAT数学考试对中国考生来说最大的考验就是熟悉出题方式和解答方法，大家通过大量的练习才能达到这个目的。

　　1.The sum of the digits of a three-digit number is . If the hundreds digit is times the tens digit and the tens digit is the units digit, what is the tens digit of the number?

　　Answer Choices

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　2.A list of integers has the property that the average (arithmetic mean), , of the integers is greater than the median, , of the integers. Which of the following must be true?

　　More of these integers are greater than than are less than .

　　More of these integers are greater than than are less than .

　　More of these integers are less than than are greater than .

　　A. None

　　B. only

　　C. only

　　D. and

　　E. and

　　3.Read the following SAT test question and then click on a button to select your answer.

　　The scatterplot above shows the number of items purchased at a grocery store by 28 customers and the total cost of each purchase. How many of these 28 customers bought more than 10 items and spent less than $20?

　　Answer Choices

　　(A) Four

　　(B) Five

　　(C) Six

　　(D) Seven

　　(E) Eight

　　4.In a certain lawn-mower factory, 0.06 percent of all mowers produced are defective. On the average, there will be 3 defective mowers out of how many produced?

　　(A) 500

　　(B) 1800

　　(C) 5000

　　(D) 18000

　　(E) 50000

　　5.In the , line is perpendicular to the graph of the function . Line could be the graph of which of the following functions?

　　Answer Choices

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　6.To make an orange dye, parts of red dye are mixed with parts of yellow dye. To make a green dye, parts of blue dye are mixed with part of yellow dye. If equal amounts of green and orange are mixed, what fraction of the new mixture is yellow dye?

　　Answer Choices

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)