SAT数学真题及解析三篇

　　SAT考试现在很受留学生们的关注，现在有很多的小伙伴都在备考SAT考试，这因为SAT考试成绩，在申请美国大部分大学时都是必须提供的，SAT数学难题其实并不多，参加SAT数学考试的大家还是要多多训练SAT数学试题，避免一些考试误区，接下来小编就给大家带来了SAT数学真题及解析，一起来看看吧。

　　1. If a? = 12, then a4 =

　　A. 144

　　B. 72

　　C. 36

　　D. 24

　　E. 16

　　Correct Answer: A

　　解析:

　　a4 = a2 x a2 = 12 x 12 = 144

　　2. If n is even, which of the following cannot be odd?

　　I n + 3

　　II 3n

　　III n? - 1

　　A. I only

　　B. II only

　　C. III only

　　D. I and II only

　　E. I, II and III

　　Correct Answer: B

　　解析:

　　In case I , even plus odd will give odd. In case II, odd times even will give even. In case III even squared is even, and even minus odd is odd. (You can check this by using an easy even number like 2 in place of n). Only case II cannot be odd.

　　3. One side of a triangle has length 8 and a second side has length 5. Which of the following could be the area of the triangle?

　　I 24

　　II 20

　　III 5

　　A. I only

　　B. II only

　　C. III only

　　D. II and III only

　　E. I, II and III

　　Correct Answer: D

　　解析:

　　The maximum area of the triangle will come when the given sides are placed at right angles. If we take 8 as the base and 5 as the height the area = ? x 8 x 5 = 20. We can alter the angle between the sides to make it less or more than 90, but this will only reduce the area. (Draw it out for yourself). Hence the area can be anything less than or equal to 20.

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