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SAT模拟考试题:SAT数学练习题(30)

2016-08-11 17:13:45来源:网络

  SAT模拟考试SAT数学练习题(30):本文是sat数学模拟题。新东方在线SAT频道为大家整理了SAT模拟考试题,供考生们参考,以下是详细内容。

  1. If a² = 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 n² - 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 = ½ 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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本文关键字: SAT模拟考试 SAT数学

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