题库 | 考满分，百万出国党的口碑之选。

序号	题目内容
81	At a certain bakery, each roll costs r cents and each doughnut costs d cents. If Alfredo bought rolls and doughnuts at the bakery, how many cents did he pay for each roll? (1) Alfredo paid $5.00 for 8 rolls and 6 doughnuts. (2) Alfredo would have paid $10.00 if he had bought 16 rolls and 12 doughnuts.
82	Is x > 0 ? (1) xy > 0 (2) x + y > 0
83	How much time did it take a certain car to travel 400 kilometers?(1) The car traveled the first 200 kilometers in 2.5 hours. (2) If the car's average speed had been 20 kilometers per hour greater than it was, it would have traveled the 400 kilometers in 1 hour less time than it did.
84	Each of the offices in a certain building has a floor area of 200, 300, or 350 square feet. How many offices are on the first floor of the building? (1) There is a total of 9,500 square feet of office floor space on the first floor of the building. (2) Ten of the offices on the first floor have floor areas of 350 square feet each.
85	Is n divisible by 12 ?(1) $$\frac{n}{6}$$ is an integer.(2) $$\frac{n}{4}$$ is an integer.
86	Do more than 50 percent of the children in a certain group have brown hair? (1) 70 percent of the boys in the group have brown hair. (2) 30 percent of the children in the group are girls with brown hair.
87	Is the integer n a multiple of 15 ? (1) n is a multiple of 20. (2) n + 6 is a multiple of 3.
88	If $$x + y \neq0$$, what is the value of $$(ax+ay)\over(x+y)$$?(1) x = 4 and y = 5.(2) a = 6
89	What is the ratio of p to r ? (1) The ratio of p to 3r is 5 to 9.(2) The sum of p and r is 16.
90	What is the value of $$a^4 - b^4$$ ?(1) $$a^2 - b^2 = 16$$(2) a + b = 8
91	In the rectangular coordinate system, are the points (r,s) and (u,v) equidistant from the origin?(1)r+s=1(2)u = 1 - r and v = 1 - s
92	X and Y are sets of positive integers. Is the greatest integer in X greater than the greatest integer in Y ?(1) X is a set of 5 consecutive odd integers, each less than 20. (2) Y is a set of 3 consecutive even integers, each less than 15.
93	The lifetimes of all the batteries produced by a certain company in a year have a distribution that is symmetric about the mean m. If the distribution has a standard deviation of d, what percent of the distribution is greater than m + d ? (1) 68 percent of the distribution lies in the interval from m - d to m + d, inclusive. (2) 16 percent of the distribution is less than m - d.
94	If \|x + 2\| = 4, what is the value of x ?(1) x^2 ≠ 4(2) x^2 = 36
95	If v and w are different integers, does v=0?(1)$${v}{w}={v}^{2}$$(2)$$w=2$$
96	Is $$\sqrt{(x-5)^2} = 5 - x$$(1) -x \|x\| > 0(2) 5 - x > 0
97	What is the median of a certain set of 7 numbers? (1) 3 of the numbers are less than 10. (2) 4 of the numbers are greater than 10.
98	Is x + y < 1 ?(1) x <$$\frac{8}{9}$$(2) y < $$\frac{1}{8}$$
99	For each home sold in County X, the buyer and the seller each must pay to County X a tax of 0.5 percent of the sale price of the home. Colleen recently sold her old home and bought a new home, both in County X. What was the total tax that Colleen paid to County X on these home sales? (1) Colleen's old home had a sale price of $169,500. (2) Colleen's new home had a sale price 20% greater than that of her old home.
100	A certain bank charges a maintenance fee on a standard checking account each month that the balance falls below $1,000 at any time during the month. Did the bank charge a maintenance fee on Sue's standard checking account last month? (1) At the beginning of last month, Sue's account balance was $1,500.(2) During last month, a total of $2,000 was withdrawn from Sue's checking account.

序号

题目内容

At a certain bakery, each roll costs r cents and each doughnut costs d cents. If Alfredo bought rolls and doughnuts at the bakery, how many cents did he pay for each roll? (1) Alfredo paid $5.00 for 8 rolls and 6 doughnuts. (2) Alfredo would have paid $10.00 if he had bought 16 rolls and 12 doughnuts.

Is x > 0 ? (1) xy > 0 (2) x + y > 0

How much time did it take a certain car to travel 400 kilometers?(1) The car traveled the first 200 kilometers in 2.5 hours. (2) If the car's average speed had been 20 kilometers per hour greater than it was, it would have traveled the 400 kilometers in 1 hour less time than it did.

Each of the offices in a certain building has a floor area of 200, 300, or 350 square feet. How many offices are on the first floor of the building? (1) There is a total of 9,500 square feet of office floor space on the first floor of the building. (2) Ten of the offices on the first floor have floor areas of 350 square feet each.

Is n divisible by 12 ?(1) $$\frac{n}{6}$$ is an integer.(2) $$\frac{n}{4}$$ is an integer.

Do more than 50 percent of the children in a certain group have brown hair? (1) 70 percent of the boys in the group have brown hair. (2) 30 percent of the children in the group are girls with brown hair.

Is the integer n a multiple of 15 ? (1) n is a multiple of 20. (2) n + 6 is a multiple of 3.

If $$x + y \neq0$$, what is the value of $$(ax+ay)\over(x+y)$$?(1) x = 4 and y = 5.(2) a = 6

What is the ratio of p to r ? (1) The ratio of p to 3r is 5 to 9.(2) The sum of p and r is 16.

What is the value of $$a^4 - b^4$$ ?(1) $$a^2 - b^2 = 16$$(2) a + b = 8