SAT数学备考中,大家可以先重点攻克OG中的数学真题,本身OG就是官方版的备考资料,其中的真题练习更有代表性,可以帮助大家更好的认识SAT数学考试,也可以让大家更深入的了解SAT数学考试的各种题型和解题方法,因此下面小编为大家整理了详细的内容,供大家参考!

  1. If f(x) = (x + 2) / (x-2) for all integers except x=2, which of the following has the greatest value?

  A. f(-1)

  B. f(0)

  C. f(1)

  D. f(3)

  E. f(4)

  2. ABCD is a square of side 3, and E and F are the mid points of sides AB and BC respectively. What is the area of the quadrilateral EBFD ?

  A. 2.25

  B. 3

  C. 4

  D. 4.5

  E. 6

  3. If n ≠ 0, which of the following must be greater than n?

  I 2n

  II n²

  III 2 - n

  A. I only

  B. II only

  C. I and II only

  D. II and III only

  E. None

  4. After being dropped a certain ball always bounces back to 2/5 of the height of its previous bounce. After the first bounce it reaches a height of 125 inches. How high (in inches) will it reach after its fourth bounce?

  A. 20

  B. 15

  C. 8

  D. 5

  E. 3.2

  5. n and p are integers greater than 1

  5n is the square of a number

  75np is the cube of a number.

  The smallest value for n + p is

  A. 14

  B. 18

  C. 20

  D. 30

  E. 50

  1.Correct Answer: D

  Explanation:

  You can solve this by back solving – substitute the answer choices in the expression and see which gives the greatest value.sat

  A (-1 + 2) / (-1-2) = -2 / 2 = -1;

  B (0 + 2) / (0-2) = 2/ -2 = -1;

  C (1 + 2) / (1-2) = 3/-1 = -3;

  D (3 + 2) / (3-2) = 5/1 = 5;

  E (4+ 2) / (4-2) = 6/2 = 3

  If you had just chosen the largest value for x you would have been wrong. So although it looks a long method, it is actually quick and accurate since the numbers are really simple and you can do the math in your head.

  2.Correct Answer: D

  Explanation:

  (Total area of square - sum of the areas of triangles ADE and DCF) will give the area of the quadrilateral 9 - (2 x ½ x 3 x 1.5) = 4.5

  3.Correct Answer: E

  Explanation:

  Remember that n could be positive negative or a fraction. Try out a few cases: In case I, if n is -1, then 2n is less than n. In case II, if n is a fraction such as ½ then n2 will be less than n. In case III, if n is 2, then 2-n = 0, which is less than n. Therefore, none of the choices must be greater than n

  4.Correct Answer: C

  Explanation:

  If after each bounce it reaches 2/5 of the previous height, then after the second bounce it will reach 2/5 x 125. After the third it will reach 2/5 x 2/5 x 125. After the fourth it will reach 2/5 x 2/5 x 2/5 x 125. This cancels down to 2 x 2 x 2 = 8

  5.Correct Answer: A

  Explanation:

  The smallest value for n such that 5n is a square is 5. 75np can now be written as 75 x 5 x p. This gives prime factors.... 3 x 5 x 5 x 5 x p To make the expression a perfect cube, p will have to have factors 3 x 3 , and hence p =9 n + p = 5 + 9 = 14

  以上就是关于“SAT OG4数学题目练习”的内容,希望通过上述内容的学习,大家能够对于SAT数学考试题目有更进一步的认识和了解,预祝各位考试成功。

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