来源： 2981人已做 600难度 90.3%正确率
来源： 2667人已做 600难度 75.1%正确率
来源： 2663人已做 600难度 96.5%正确率
来源： 2609人已做 600难度 94.9%正确率
来源： 2608人已做 600难度 93.6%正确率
来源： 2653人已做 600难度 79.5%正确率
来源： 2744人已做 600难度 88.1%正确率
来源： 2636人已做 650难度 87.7%正确率
来源： 2717人已做 600难度 75.1%正确率
来源： 2676人已做 600难度 78.1%正确率
Alaska regularly deposits some of its profits from the sale of oil into a special fund, with the intention to sustain the state’s economy after the exhaustion of its oil reserves.
Some species of Arctic birds are threatened by recent sharp increases in the population of snow geese, which breed in the Arctic and are displacing birds of less vigorous species. Although snow geese are a popular quarry for hunters in the southern regions where they winter, the hunting season ends if and when hunting has reduced the population by five percent, according to official estimates. Clearly, dropping this restriction would allow the other species to recover. Which of the following, if true, most seriously undermines the argument?
A share of company P is 20 percent more expensive than a share of company Q. What is the ratio of the total value of shares outstanding of company Q to the total value of shares outstanding of company P?(1)The trading volume of shares of company Q is 25 percent more than that of company P.(2) The value of shares outstanding of company Q is $6,000,000 and the value of shares outstanding of company P is $8,000,000.
A fraternity wants to enroll members of the college rowing team as members. The result of the fraternity's effort to recruit new members from the rowing team exceeds the fraternity's expectation by 20 percent. Assuming that the rowing team admits only males, what is the total number of people on the rowing team?(1) The goal was to enroll 15 percent of the members of the rowing team.(2) The number of rowing team members enrolling as new fraternity members was 40.
The letters C, I, R, C, L and E can be used to form 6-letter strings such as CIRCLE or CCIRLE. Using these letters, how many different 6-letter strings can be formed in which the two occurrences of the letter C are separated by at least one other letter?
The cost of each adult's ticket for a certain concert was $30, and the cost of each child's ticket for the concert was $24. If Hannah purchased tickets for this concert, what was the average (arithmetic mean) cost per ticket?(1) Hannah purchased twice as many children's tickets as adults' tickets.(2) Hannah purchased 4 children's tickets.
If the prime numbers p and t are the only prime factors of the integer m, is m a multiple of p2 t ?(1) m has more than 9 positive factors.(2) m is a multiple of p3 .
If m and r are two numbers on a number line, what is the value of r ?(1) The distance between r and 0 is 3 times the distance between m and 0 .(2) 12 is halfway between m and r.
If t is a positive integer and r is the remainder when t2 + 5t + 6 is divided by 7, what is the value of r ?(1) When t is divided by 7, the remainder is 6.(2) When t2 is divided by 7, the remainder is 1.
If n is a positive integer and r is the remainder when n2 - 1 is divided by 8, what is the value of r ?(1) n is odd.(2) n is not divisible by 8.