同学如果想提高SAT数学考试成绩,那么就必须坚持做练习,如果每天能够完成5道SAT数学题目,并且总结解题的经验,小站教育相信大家的成绩就会有明显地提高。
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.
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