剛開始準備GMAT很多以前的基礎都忘記了
好多題目不知道怎麼解
麻煩大家拜託拜託
Math Q2: Acertain roller coaster has 3 cars, and a passenger is equally likely to ride inany 1 of the 3 cars each time that passenger rides the roller coaster. If a certain passenger is to ride the rollercoaster 3 times, what is the probability that the passenger will ride in eachof the 3 cars? A. 0 B. 1/9 C. 2/9 D. 1/3 E. 1 Answer: C ------------------------------------------------------------------------------------------------------------ Q4: Ifn is the product of the integers from1 to 20 inclusive, what is the greatestinteger k for which 2k is a factor of n? A. 10 B. 12 C. 15 D. 18 E. 20 Answer: D ------------------------------------------------------------------------------------------------------------ Q7: Acircular mat with diameter 20 inches is placed on a square tabletop, each ofwhose sides is 24 inches long.
Which ofthe following is closest to the fraction of the tabletop covered by the mat? A. 5/12 B. 2/5 C. 1/2 D. 3/4 E. 5/6 Answer: C ------------------------------------------------------------------------------------------------------------ Q9: Agardener is going to plant 2 red rosebushes and 2 white rosebushes. If the gardener is to select each of the bushesat random, one at a time, and plant them in a row, what is the probability thatthe 2 rosebushes in the middle of the row will be the red rosebushes? A. 1/12 B. 1/6 C. 1/5 D. 1/3 E. 1/2 Answer: B ------------------------------------------------------------------------------------------------------------ Q14: If1050 – 74 is written as an integer in base 10 notation, what is thesum of the digits in that integer? A. 424 B. 433 C. 440 D. 449 E. 467 Answer: C ------------------------------------------------------------------------------------------------------------ Q17: InTown X, 64 percent of the population are employed, and 48 percent of thepopulation are employed males. Whatpercent of the employed people in Town X are females? A. 16% B. 25% C. 32% D. 40% E. 52% Answer: B ------------------------------------------------------------------------------------------------------------ Q19: Atotal of $60,000 was invested for one year. But of this amount earned simple annual interest at the rate of xpercent per year, and the rest earned simple annual interest at the rate of ypercent per year. If the total interestearned by the $60,000 for that year was $4,080, what is the value of x? (1) x =(3/4) y (2) The ratio of the amount that earned interestat the rate of x percent per year to the amount that earned interest at therate of y percent per year was 3 to 2. A.Statement (1) ALONE is sufficient, but statement (2) alone is notsufficient. B.Statement (2) ALONE is sufficient, but statement (1) alone is notsufficient. C.BOTH statements TOGETHER are sufficient, but NEITHERstatement ALONE is sufficient. D.EACH statement ALONE is sufficient. E.Statements (1) and (2) TOGETHER are NOT sufficient. Answer: C ------------------------------------------------------------------------------------------------------------ Q22: Inthe sequence 1, 2, 4, 8, 16, 32, …, each term after the first is twice theprevious term. What is the sum of the16th, 17th, and 18th terms in the sequence? A. 218 B. 3(217) C. 7(216) D. 3(216) E. 7(215) Answer: E ------------------------------------------------------------------------------------------------------------ Q25: Aphotographer will arrange 6 people of 6 different heights for photograph byplacing them in two rows of three so that each person in the first row isstanding in front of someone in the second row. The heights of the people within each row must increase from left toright, and each person in the second row must be taller than the personstanding in front of him or her. Howmany such arrangements of the 6 people are possible? A. 5 B. 6 C. 9 D. 24 E. 36 Answer: A ------------------------------------------------------------------------------------------------------------ Q26: Runningat their respective constant rates, machine X takes 2 days longer to produce wwidgets than machine Y. At these rates,if the two machines together produce 5/4 w widgets in 3 days, how many dayswould it take machine X alone to produce 2w widgets? A. 4 B. 6 C. 8 D. 10 E. 12 Answer: E ------------------------------------------------------------------------------------------------------------ Q29: June25, 1982, fell on a Friday. On which dayof the week did June 25, 1987, fall? (Note: 1984 was a leap year.) A. Sunday B. Monday C. Tuesday D. Wednesday E. Thursday Answer: E ------------------------------------------------------------------------------------------------------------ Q30: Joannabought only $0.15 stamps and $0.29 stamps. How many $0.15 stamps did she buy? (1) Shebought $4.40 worth of stamps. (2) Shebought an equal number of $0.15 stamps and $0.29 stamps. A.Statement (1) ALONE is sufficient, but statement (2) alone is notsufficient. B.Statement (2) ALONE is sufficient, but statement (1) alone is notsufficient. C.BOTH statements TOGETHER are sufficient, but NEITHERstatement ALONE is sufficient. D.EACH statement ALONE is sufficient. E.Statements (1) and (2) TOGETHER are NOT sufficient. Answer: D ------------------------------------------------------------------------------------------------------------ Q31: Apositive integer n is said to be “prime-saturated” if the product of all thedifferent positive prime factors of n is less than the square root of n. What is the greatest two-digitprime-saturated integer? A. 99 B. 98 C. 97 D. 96 E. 95 Answer: D ------------------------------------------------------------------------------------------------------------ Q34: The function f isdefined by f(x) = - 1/x for all nonzero numbers x. If f(a) = - 1/2 and f(ab) = 1/6, then b = A. 3 B. 1/3 C. - 1/3 D. -3 E. –12 Answer: D ------------------------------------------------------------------------------------------------------------ Q35: Whatis the median number of employees assigned per project for the projects atCompany Z? (1) 25 percent of the projects at Company Z have4 or more employees assigned to each project. (2) 35 percent of the projects at Company Z have 2or fewer employees assigned to each project. A.Statement (1) ALONE is sufficient, but statement (2) alone is notsufficient. B.Statement (2) ALONE is sufficient, but statement (1) alone is notsufficient. C.BOTH statements TOGETHER are sufficient, but NEITHERstatement ALONE is sufficient. D.EACH statement ALONE is sufficient. E.Statements (1) and (2) TOGETHER are NOT sufficient. Answer: C
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发表于 2014-3-2 12:11:01
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