SAT数学部分想要提分,大家还是需要进行真题的练习。那么具体的哪些数学题目更值得大家来复习。包含的重要知识点都有哪些?这些都是考生在选择真题的时候,需要考虑的因素。下面小编为大家整理了详细的内容,供大家参考!

  1. If f(x) = x2 – 3, where x is an integer, which of the following could be a value of f(x)?

  I 6

  II 0

  III -6

  A. I only

  B. I and II only

  C. II and III only

  D. I and III only

  E. I, II and III

  Correct Answer: A

  解析:

  Choice I is correct because f(x) = 6 when x=3. Choice II is incorrect because to make f(x) = 0, x2 would have to be 3. But 3 is not the square of an integer. Choice III is incorrect because to make f(x) = 0, x2 would have to be –3 but squares cannot be negative. (The minimum value for x2 is zero; hence, the minimum value for f(x) = -3)

  2. For how many integer values of n will the value of the expression 4n + 7 be an integer greater than 1 and less than 200?

  A. 48

  B. 49

  C. 50

  D. 51

  E. 52

  Correct Answer: C

  解析:

  1 < 4n + 7 < 200. n can be 0, or -1. n cannot be -2 or any other negative integer or the expression 4n + 7 will be less than1. The largest value for n will be an integer < (200 - 7) /4. 193/4 = 48.25, hence 48. The number of integers between -1 and 48 inclusive is 50

  3. In the following correctly worked addition sum, A,B,C and D represent different digits, and all the digits in the sum are different. What is the sum of A,B,C and D?

  A. 23

  B. 22

  C. 18

  D. 16

  E. 14

  Correct Answer: B

  解析:

  First you must realize that the sum of two 2-digit numbers cannot be more that 198 (99 + 99). Therefore in the given problem D must be 1. Now use trial and error to satisfy the sum 5A + BC = 143. A + C must give 3 in the units place, but neither can be 1 since all the digits have to be different. Therefore A + C = 13. With one to carry over into the tens column, 1 + 5 + B = 14, and B = 8. A + C + B + D = 13 + 8 + 1 = 22

  4. 12 litres of water a poured into an aquarium of dimensions 50cm length , 30cm breadth, and 40 cm height. How high (in cm) will the water rise?

  (1 litre = 1000cm3)

  A. 6

  B. 8

  C. 10

  D. 20

  E. 40

  Correct Answer: B

  解析:

  Total volume of water = 12 liters = 12 x 1000 cm3. The base of the aquarium is 50 x 30 = 1500cm3. Base of tank x height of water = volume of water. 1500 x height = 12000; height = 12000 / 1500 = 8

  以上是小编为大家分享的“【数学】新SAT数学练习题附答案解析“资料,希望可以指导大家有效备考SAT。

  小编推荐:

  【本期福利】原版McGraw-Hill 12 Practice Tests + PSAT 附12套题

  【完整版】《SAT阅读与填空30天速成真经》pdf 网盘下载

  2018年SAT真题汇总(北美&亚洲)

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