GWD11(版本不太一样，找不到讨论@@)

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Q3:

What is the probability that a student randomly selected from a class of 60 students will be a male who has brown hair?

(1)     One-half of the students have brown hair.

(2)     One-third of the students are males.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

Answer:

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Q7:

Before a certain tire is used, 40 percent of its total weight consists of tread.  If during a lifetime of use, 50 percent, by weight, of the tire’s tread is lost and no other parts of the tire is lost, what per cent of the tire’s total remaining weight consists of the remaining tread?

A.   55%

B.   20%

C.   25%

D.       30%

E.        35%

Answer:

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Q8:

When positive integer x is divided by 5, the remainder is 3; and when x is divided by 7, the remainder is 4.  When positive integer y is divided by 5, the remainder is 3; and when y is divided by 7, the remainder is 4.  If x > y, which of the following must be a factor of x - y?

A.      12

B.      15

C.      20

D.     28

E.      35

Answer:

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Q11:

A certain company that sells only cars and trucks reported that revenues from car sales in 1997 were down 11 percent from 1996 and revenues from truck sales in 1997 were up 7 percent from 1996.  If total revenues from car sales and truck sales in 1997 were up 1 percent from 1996, what is the ratio of revenue from car sales in 1996 to revenue from truck sales in 1996?

A.      1 : 2

B.      4 : 5

C.      1 : 1

D.     3 : 2

E.      5 : 3

Answer:

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