SAT数学备考复习中,大家需要多练习各种题目类型,这样才能够帮助我们更加全面的来备考数学考试内容,因此下面小编为大家整理了一些真题练习,辅助大家练习,下面让我们来看看详细的内容吧!

  1. In a sequence of numbers the first number is 3 and each number after the first is 2 more than 3 times the preceding number. What is the fourth term in the sequence?

  2. If the average of 3 and x is 5, and the average of 5 and y is 7, what is the average of x and y?

  3. A right circular cylinder has an volume of 81π. If the circumference of the base is 6π, what is the height?

  4. Using the digits 1,2,5,9 exactly once in each number, what is the difference between the largest and the smallest number that can be formed?

  5. How many numbers between 1 and 100 contain the digit 8?

  6. If k is a positive integer, what is the smallest value for k to make 60k a perfect square?

  7. What is the sum of x, y and z in the figure above?

  8. The school library has 50 action adventure novels, 15 romances and 10 historical novels. Julie wants to take one of each type for her sick cousin to read. How many different choices of three books are available to her?

  9. The fraction x/y is altered by decreasing x by 25 per cent and increasing y by 25 percent. The new fraction is what percent less than the original?

  10. A CD player chooses a track at random from three discs each with 20 racks. What is the probability that it chooses track 2 of disc 2?

  参考答案:

  1.Correct Answer: 107

  Explanation:

  Second term = 3x3 + 2 = 11; Third term = 3x11 +2 = 35; Fourth term = 3x35 +2 = 107

  2.Correct Answer: 8

  Explanation:

  If the average of 3 and x = 5, the total = 10, and x = 10-3 = 7

  If the average of 5 and y = 7, the total = 14, and y = 14-5 = 9

  The average of x and y is 7+9 / 2 = 8

  3.Correct Answer: 9

  Explanation:

  The volume of a cylinder = area of base x height

  6π = circumference = 2πr ; 6/2 = r

  Area of base = πr2 = π 3x 3 = 9π

  81π = 9π x height; height = 9

  4.Correct Answer: 8262

  Explanation:

  The largest number is 9521

  The smallest is 1259

  The difference = 8262

  5.Correct Answer: 19

  Explanation:

  The numbers containing 8 are:

  8, 18, 28, 38, 48, 58, 68, 78, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 98

  6.Correct Answer: 15

  Explanation:

  To find a perfect square we need the prime factors.

  60 = 2 x 2 x 3 x 5

  To turn it into a perfect square we need to multiply by 3 x 5 = 15

  (So that the prime factors are in groups of two = 2 x 2 x 3 x 3 x 5 x 5)

  7.Correct Answer: 410

  Explanation:

  By drawing three lines inside the figure (from angle y to angles 110, 110 and 90) we can divide the figure into four triangles. Therefore the sum of the interior angles = 4 x 180 = 720

  x + y + z = 720 - 110 - 110 - 90 = 410

  8.Correct Answer: 7500

  Explanation:

  She has 50 choices of action books which ca be combined with any of 15 romances. This give us 50 x 15 =750 combinations which in turn can be combined with any of 10 historical novels to give a total number of choices 750 x 10 = 7500

  9.Correct Answer: 40

  Explanation:

  Decreasing x by 25 per cent gives 0.75x

  Increasing y by 25 percent gives 1.25y

  The new fraction is 0.75x/1.25y = 0.6x/y

  This is 0.4 less (= 40 percent)

  10.Correct Answer: 1/60

  Explanation:

  Total number of tracks is 60. If one is chosen at random the probability is 1/60. This is very easy; don’t be distracted by irrelevant information.

  以上就是关于“SAT Math真题练习附参考答案”的内容,希望通过上述内容的学习,大家能够更好的备考SAT数学考试,在考试中取得高分成绩。

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