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PREP07 Test 2 PREP07 Test 1 Manhattan Magoosh KMFPS 排列组合几何应用题代数数论 OG20 OG21 OG20-数学分册 OG20-语文分册 OG19-数学分册 OG19 OG18-数学分册 OG18 OG17 OG16 OG15 OG12 OG2022

《2018 GMAT官方指南》

《2018 GMAT官方指南》是GMAC（GMAT考试命题机构）中国大陆单家授权版本，是GMAT考试必备的专业辅导书。《2018 GMAT官方指南》系列总共有3本指南，其中包含15%的全新内容，在《2018 GMAT官方指南》2018版中更新了130道全新真题，《GMAT文本逻辑推理》2018版更新了45道全新真题，以及《GMAT定量推理》2018版更新了45道全新真题。

题目列表

序号	题目内容
221	Xavier, Yvonne, and Zelda each try independently to solve a problem. If their individual probabilities for success are $$\frac{1}{4}$$, $$\frac{1}{2}$$ and $$\frac{5}{8}$$ respectively, what is the probability that Xavier and Yvonne, but not Zelda, will solve the problem?
222	if $$\frac{1}{x}-\frac{1}{x+1}=\frac{1}{x+4}$$ then x could be
223	$$(\frac{1}{2})^{-3}(\frac{1}{4})^{-2}(\frac{1}{16})^{-1}=$$
224	The figure shown above consists of a shaded 9-sided polygon 9 unshaded isosceles triangles. For each isosceles triangle, the longest side is a side of the shaded polygon and the two sides of equal length are extensions of the two adjacent sides of the shaded polygon. What is the value of a?
225	List T consists of 30 positive decimals, none of which is an integer, and the sum of the 30 decimals is S. The estimated sum of the 30 decimals, £, is defined as follows. Each decimal in T whose tenths digit is even is rounded up to the nearest integer, and each decimal in T whose tenths digit is odd is rounded down to the nearest integer; E is the sum of the resulting integers. If $$\frac{1}{3}$$ of the decimals in T have a tenths digit that is even, which of the following is a possible value of E - S ?I.-16II.6III.10
226	If $$5-\frac{6}{x}=x$$ then x has how many possible values?
227	Seed mixture X is 40 percent ryegrass and 60 percent bluegrass by weight; seed mixture Y is 25 percent ryegrass and 75 percent fescue. If a mixture of X and Y contains 30 percent ryegrass, what percent of the weight of the mixture is X ?
228	How many of the integers that satisfy the inequality $${\frac{(x+2)(x+3)}{x-2}}\ge{0}$$ are less than 5 ?
229	Of the 150 houses in a certain development, 60 percent have air - conditioning, 50 percent have a sunporch, and 30 percent have a swimming pool. If 5 of the houses have all three of these amenities and 5 have none of them, how many of the houses have exactly two of these amenities?
230	The value of $$\frac{({2}^{-14}+{2}^{-15}+{2}^{-16}+{2}^{-17})}{5}$$ is how many times the value of$${2}^{-17}$$?