题库 | 考满分，百万出国党的口碑之选。

序号	题目内容
21	Is the integer n odd?(1)n is divisible by3.(2)2n is divisible by twice as many positive integers as n.
22	Is $$\frac{1}{p}>{r\over(r^2+2)}$$?(1) p = r(2) r > 0
23	In the table above, is z = 20q ? (1) q = 3 (2) Each value in the table other than q is equal to the sum of the value immediately above it in the table and the value immediately to its left in the table.
24	One member of a committee of 5 men and 8 women resigned and was not replaced. What fraction of the remaining members were men? (1) 7 of the 12 remaining members were women. (2) The member who resigned was a woman.
25	If x and y are greater than 0, is x = 1 ?(1 )$$\frac{x}{y}= 1$$(2) xy = 1
26	If x and y are integers, is the value of x(y + 1) even? (1) x and y are prime numbers. (2) y > 7
27	Does set S contain any even numbers? (1) There are no prime numbers in S. (2) There are no multiples of 4 in S.
28	A certain movie depicted product A in 21 scenes, product B in 7 scenes, product C in 4 scenes, and product D in 3 scenes. The four product manufacturers paid amounts proportional to the number of scenes in which their product was depicted in the movie. If each manufacturer paid x dollars per scene, how much did the manufacturer of product D pay for this advertising?(1) The manufacturers of products A and B together paid a total of $560,000 for this advertising. (2) The manufacturer of product B paid $60,000 more for this advertising than the manufacturer of product C paid.
29	Is the positive integer n odd?(1) n = 2k + 1, where k is a positive integer.(2) 2n + 1 is an odd integer.
30	If n is an integer, is n/7 an integer?(1) (3n)/7 is an integer(2) (5n)/7 is an integer.
31	If a wire 27 meters long is cut into three pieces of three different lengths, what is the length of the longest piece? (1) The length of the longest piece is twice the length of the shortest piece. (2) The sum of the lengths of the two shorter pieces is 15 meters.
32	Is positive integer n divisible by 3 ?(1) $$(n^2)\over36$$ is an integer.(2) $$144\over(n^2)$$ is an integer.
33	If a > 0, b > 0, and c > 0, is a(b - c) = 0 ?(1) b – c = c - b(2)$$\frac{b}{c}=\frac{c}{b}$$
34	Are positive integers p and q both greater than n ? (1) p - q is greater than n . (2) q > p
35	What is the value of $$xy$$?(1)$$y=x+1$$(2)$$y={x}^{2} + 1$$
36	If ax + b = 0, is x > 0 ? (1) a + b > 0 (2) a - b > 0
37	Are the integers z and f to the right of 0 on the number line? (1) The product of z and f is positive. (2) The sum of z and f is positive.
38	Some of the students enrolled at College T are part-time students and the rest are full-time students. By what percent did the number of full-time students enrolled at College T increase from the fall of 1999 to the fall of 2000 ? (1) There were 50 more full-time students enrolled at College T in the fall of 2000 than in the fall of 1999. (2) The total number of students enrolled at College T increased by 5 percent from the fall of 1999 to the fall of 2000.
39	If c and d are integers, is c even? (1) c(d + 1) is even. (2) (c + 2)(d + 4) is even.
40	If set S consists of the numbers 1, 5, -2, 8, and n, is 0 < n < 7 ? (1) The median of the numbers in S is less than 5. (2) The median of the numbers in S is greater than 1.

序号

题目内容

Is the integer n odd?(1)n is divisible by3.(2)2n is divisible by twice as many positive integers as n.

Is $$\frac{1}{p}>{r\over(r^2+2)}$$?(1) p = r(2) r > 0