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  SAT模拟考试题:SAT数学SAT考试数学练习题SAT Math Practice Test 2

  1. Which of the following could be a value of x, in the diagram above?

  A. 10

  B. 20

  C. 40

  D. 50

  E. any of the above

  2. Helpers are needed to prepare for the fete. Each helper can make either 2 large cakes or 35 small cakes per hour. The kitchen is available for 3 hours and 20 large cakes and 700 small cakes are needed. How many helpers are required?

  A. 10

  B. 15

  C. 20

  D. 25

  E. 30

  3. Jo's collection contains US, Indian and British stamps. If the ratio of US to Indian stamps is 5 to 2 and the ratio of Indian to British stamps is 5 to 1, what is the ratio of US to British stamps?

  A. 5 : 1

  B. 10 : 5

  C. 15 : 2

  D. 20 : 2

  E. 25 : 2

  4. A 3 by 4 rectangle is inscribed in circle. What is the circumference of the circle?

  A. 2.5π

  B. 3π

  C. 5π

  D. 4π

  E. 10π

  5. Two sets of 4 consecutive positive integers have exactly one integer in common. The sum of the integers in the set with greater numbers is how much greater than the sum of the integers in the other set?

  A. 4

  B. 7

  C. 8

  D. 12

  E. it cannot be determined from the information given.

  6. If f(x) = (x + 2) / (x-2) for all integers except x=2, which of the following has the greatest value?

  A. f(-1)

  B. f(0)

  C. f(1)

  D. f(3)

  E. f(4)

  7. ABCD is a square of side 3, and E and F are the mid points of sides AB and BC respectively. What is the area of the quadrilateral EBFD ?

  A. 2.25

  B. 3

  C. 4

  D. 4.5

  E. 6

  8. If n ≠ 0, which of the following must be greater than n?

  I 2n

  II n2

  III 2 - n

  A. I only

  B. II only

  C. I and II only

  D. II and III only

  E. None

  9. After being dropped a certain ball always bounces back to 2/5 of the height of its previous bounce. After the first bounce it reaches a height of 125 inches. How high (in inches) wi

  ill it reach after its fourth bounce?

  A. 20

  B. 15

  C. 8

  D. 5

  E. 3.2

  10. n and p are integers greater than 1

  5n is the square of a number

  75np is the cube of a number.

  The smallest value for n + p is

  A. 14

  B. 18

  C. 20

  D. 30

  E. 50

  1.Correct Answer: B

  Explanation:

  The marked angle, ABC must be more than 90 degrees because it is the external angle of triangle BDC, and must be equal to the sum of angles BDC (90) and DCB.

  Also ABC is not a straight line and must be less than 180.

  Therefore 90 < 5x < 180

  The only value of x which satisfies this relation is 20.

  2.Correct Answer: A

  Explanation:

  20 large cakes will require the equivalent of 10 helpers working for one hour. 700 small cakes will require the equivalent of 20 helpers working for one hour. This means if only one hour were available we would need 30 helpers. But since three hours are available we can use 10 helpers.

  3.Correct Answer: E

  Explanation:

  Indian stamps are common to both ratios. Multiply both ratios by factors such that the Indian stamps are represented by the same number.

  US : Indian = 5 : 2, and Indian : British = 5 : 1. Multiply the first by 5, and the second by 2.

  Now US : Indian = 25 : 10, and Indian : British = 10 : 2

  Hence the two ratios can be combined and US : British = 25 : 2

  4.Correct Answer: C

  Explanation:

  Draw the diagram. The diagonal of the rectangle is the diameter of the circle. The diagonal is the hypotenuse of a 3,4,5 triangle, and is therefore, 5.

  Circumference = π.diameter = 5π

  5.Correct Answer: D

  Explanation:

  If two sets of four consecutive integers have one integer in common, the total in the combined set is 7., and we can write the sets as

  n + (n + 1) + (n + 2) + (n + 3 ) and

  (n + 3) + (n + 4) + (n + 5) + (n + 6)

  Note that each term in the second set is 3 more than the equiv

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