SAT数学练习题 含详细答案及解析(2)

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下面是几道SAT数学练习题，每道题目后面都有答案和详细的解析，希望同学们在练习的时候先不看答案，看看自己的能做对几道题，然后再与答案对照，找出错题原因，针对自己的SAT数学复习进行查漏补缺。

1. The distance from town A to town B is five miles. C is six miles from B.

Which of the following could be the distance from A to C?

I 11

II 1

III 7

A. I only

B. II only

C. I and II only

D. II and III only

E. I, II, or III.

Correct Answer: E

解析:

Do not assume that AB and C are on a straight line. Make a diagram with A and

B marked 5 miles apart. Draw a circle centered on B, with radius 6. C could be

anywhere on this circle. The minimum distance will be 1, and maximum 11, but

anywhere in between is possible.

2. √5 percent of 5√5 =

A. 0.05

B. 0.25

C. 0.5

D. 2.5

E. 25

Correct Answer: B

解析:

We can write the statement mathematically, using x to mean ‘of’ and /100 for

‘per cent’. So ( √5/100) x 5√5 = 5 x 5 /100 = 0.25

3. If pqr = 1 , rst = 0 , and spr = 0, which of the following must be

zero?

A. P

B. Q

C. R

D. S

E. T

Correct Answer: D

解析:

If pqr = 1, none of these variable can be zero. Since spr = 0 , and since p

and r are not zero, s must be zero. (Note that although rst = 0, and so either s

or t must be zero, this is not sufficient to state which must be zero)