SAT数学练习题及详细答案解析(2)

2022-06-09 13:07:18

  下面是5道

  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)

  4.

  A. 1/5

  B. 6/5

  C. 6³

  D. 64 / 5

  E. 64

  Correct Answer: E

  解析:

  65 = 64x 6

  (64 x 6) - 64 = 64(6 - 1) = 64 x 5 Now, dividing by 5 will give us 64

  5. -20 , -16 , -12 , -8 ....

  In the sequence above, each term after the first is 4 greater than the preceding term. Which of the following could not be a term in the sequence?

  A. 0

  B. 200

  C. 440

  D. 668

  E. 762

  Correct Answer: E

  解析:

  All terms in the sequence will be multiples of 4. 762 is not a multiple of 4

  要想SAT数学成绩有所提高,坚持每天做练习是十分必要的,就像这样每天完成5道SAT数学题目,并进行总结,日积月累,成绩就会有明显地提高。

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