5道练习题测试你的SAT数学能力.

　　SAT数学考试是中国学生最容易得分的考试，但也需要大家平时的积累和练习，下面是澳际小编为大家带来的5道SAT数学练习题的内容及答案，都是精选自SAT官方每日一题的数学部分，大家一起来练习一下吧。

　　1.The histogram above shows the distribution of 31 black cherry trees, by height. For example, the ltmost bar represents the black cherry trees that are at least 60 feet, but not less than 65 feet, in height. Based on the histogram, which of the following can be the average (arithmetic mean) height of the 31 black cherry trees?

　　Answer Choices

　　(A) 70 feet

　　(B) 72 feet

　　(C) 74 feet

　　(D) 78 feet

　　(E) 80 feet

　　2.In the figure above, O is the center of the circle and triangle A B O is equilateral. If the sides of triangle A B O are of length 6, what is the length of line B C?

　　(A) 3 times square root 3

　　(B) 4 times square root 3

　　(C) 6 times square root 3

　　(D) 9

　　(E) 12

　　3.When the positive integer n is divided by 5, the remainder is 0. What is the remainder when 3n is divided by 5?

　　(A) 0

　　(B) 1

　　(C) 2

　　(D) 3

　　(E) 4

　　4.A 6-sided number cube, with faces numbered 1 through 6, is to be rolled twice. What is the probability that the number that comes up on the first roll will be less than the number that comes up on the second roll?

　　(A) 1 over 4

　　(B) 1 over 3

　　(C) 5 over 12

　　(D) 7 over 12

　　(E) 1 over 2

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

　　(A) 500

　　(B) 1800

　　(C) 5000

　　(D) 18000

　　(E) 50000

　　?Explanation?

　?　?1.The correct answer is C??

　　?2.The correct answer is C?

　　Choice (C) is correct. Since triangle A B O is equilateral, each of its angles has measure 60 degrees. It follows that angle B O C has measure 120 degrees. Since line O B and line O C are radii of the same circle, they are of equal length, and so delta O C B is isosceles. Hence angle O B C and angle O C B each have measure 30 degrees. Thus angle A B C has measure 60 degrees + 30 degrees = 90 degrees, and so triangle A B C is a 30 degrees minus 60 degrees minus 90 degrees right triangle. Since line A B, the side opposite the 30 degrees angle in triangle A B C, is of length 6, it follows that line B C, the side opposite the 60 degrees angle, is of length 6 times square root 3

　　?3.The correct answer is A?

　　Choice (A) is correct. When the positive integer n is divided by 5, the remainder is 0. It follows that n is a multiple of 5. Therore, 3n is also a multiple of 5, and so the remainder when 3n is divided by 5 is likewise 0.

　　?4.The correct answer is C?

　　?5.The correct answer is C?

　　Recall that 0.06 percent means 0.06 out of every 100, or 6 out of every 10000. The question asks for an equivalent ratio: 3 out of how many. The ratio 6 out of 10000 can be reduced (by dividing both members by 2) to 3 out of 5000.

　　以上就是澳际小编为大家带来的5道精选SAT数学练习题及答案的内容，大家可以从中了解SAT数学题的出题方式，但真正的SAT数学考试的难度比这个要高。更多SAT数学考试技巧，请关注澳际教育SAT频道。