sat数学真题

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sat数学真题

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. There are 8 sections of seats in an auditorium. Each section contains at least 150 seats but not more than 200 seats. Which of the following could be the number of seats in this auditorium?

(A) 800

(B) 1,000

(C) 1,100

(D) 1,300

(E) 1,700

6. If rsuv = 1 and rsum = 0, which of the following must be true?

(A) r < 1

(B) s < 1

(C) u= 2

(D) r = 0

(E) m = 0

7. The least integer of a set of consecutive integers (连续整数) is –126. if the sum of these integers is 127, how many integers are in this set?

(A) 126

(B) 127

(C) 252

(D) 253

(E) 254

8. Of the following, which is greater than ½ ?

A. 2/5

B. 4/7

C. 4/9

D. 5/11

E. 6/13

9. If an object travels at five feet per second, how many feet does it travel in one hour?

A. 30

B. 300

C. 720

D. 1800

E. 18000

10. What is the average (arithmetic mean) of all the multiples of ten from 10 to 190 inclusive?

A. 90

B. 95

C. 100

D. 105

E. 110