SAT数学考试：多练习习题,掌握更多技巧

2019-11-07826次浏览

　　SAT考试，是美国大学入学考试，首先我们不可避免的就是SAT备考准备，其中的SAT数学考试是很多同学头疼的，为了大家能够更好的备考，今天小编就为大家带来关SAT数学考试真题介绍，希望能够帮助大家，下面就和小编一起看看吧。

　　1. 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

　　2. 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 benegative. (The minimum value for x2 is zero; hence, the minimum value for f(x) = -3)

　　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

　　SAT数学真题解析:

　　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

　　5. Six years ago Anita was P times as old as Ben was. If Anita is now 17 years old, how old is Ben now in terms of P ?

　　A. 11/P + 6

　　B. P/11 +6

　　C. 17 - P/6

　　D. 17/P

　　E. 11.5P

　　Correct Answer: A

　　解析:

　　Let Ben’s age now be B. Anita’s age now is A. (A - 6) = P(B - 6)

　　But A is 17 and therefore 11 = P(B - 6). 11/P = B-6

　　(11/P) + 6 = B

　　以上就是小编为大家整理的关于SAT考试备考介绍，希望同学们能够更好的掌握备考技巧，想要获取更多新SAT考试分数等更多信息，大家可以线上咨询客服哦！最后小编预祝大家能考取心中满意成绩。