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Magoosh题集

Magoosh针对GRE考试备考材料相对可以，其推出的GMAT模考题对时间固定GMAT考生来说，老师并不建议过多时间花费在该材料上。这些题可以作为词汇拓展训练。

161 If $10^{a} x 10^{b} x 10^{c} = 1,000,000$, and a, b, and c are different positive integers, then $10^{a} + 10^{b} + 10^{c} =$
162 If the average (arithmetic mean) of five consecutive negative integers is 2k – 1, what is the difference between the greatest and least of the five integers?
163 If 3x < 2y < 0, which of the following must be the greatest?
164 What is the sum of all integers from 45 to 155 inclusive?
165 If the ratio of the volume of cube A to the volume of cube B is 1 to 8, what is the ratio of the surface area of cube A to the surface area of cube B?
166 2x + y years ago, Roberto was 3x + y years old. How many years old was Roberto x years ago?
167 If |x + 5| = 3 and ${{|2y - 1|}\over{3}} = 5$, then |x + y| could equal each of the following EXCEPT
168 $\frac{228}{494}$=
169 $(x)(5+\sqrt{7})=90$In the equation above, x =
170 A company has 3 vice presidents, 15 executives, 82 data entry employees, and no other employees. The average salary for the fifteen executives is $80,000 and the average salary for the 82 data entry employees is$25,000. If the average salary across all three types of employees is $44,500, then what is the average salary of the three vice presidents? 171 In the below addition A, B, C, D, E, F, and G represent the digits 0, 1, 2, 3, 4, 5 and 6. If each variable has a different value, and E $\neq$0, then G equals 172 In a certain sock drawer, there are 4 pairs of black socks, 3 pairs of gray socks and 2 pairs of orange socks. If socks are removed at random without replacement, what is the minimum number of socks that must be removed in order to ensure that two socks of the same color have been removed? 173 Each circle has center O. The radius of the smaller circle is 2 and the radius of the larger circle is 6. If a point is selected at random from the larger circular region, what is the probability that the point will lie in the shaded region? 174 If $8^{c}×\sqrt{8}={8^{a}\over8^{b}}$ then a=？ 175 If 5x - 3y = 7 and 2y - 4x = 3, then 2x - 2y = 176 If A is the initial amount put into an account, P is the annual percentage rate of interest, which remains fixed, and the account compounds quarterly, which of the following is an expression, in terms of A and P, for the amount in the account after 5 years? 177 If x and y are both positive then $\sqrt{72x^{3}y^{16}}$ = 178 If xy = 5 and $x^{2} + y^{2} = 12$, then$\frac{x}{y} + \frac{y}{x}$= 179 O is the center of the semicircle. If ∠BCO=30°and BC =$6\sqrt{3}$ , what is the area of triangle ABO? 180 After receiving a 25% discount, Sue paid$180 for a lawnmower. What is the original price of the lawnmower before the discount?

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