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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。

281 How many odd, positive divisors does 540 have?
282 2600 has how many positive divisors?
283 Last year, the price per transaction of certain company increases P percent from the year before, and the number of transactions increase N percent from the year before. Total revenue is simply the number of transactions times the price per transaction. Assume this one transaction is this company's only source of revenue. Which of the following is the percent increase in revenue last year, from the year before?
284 A box contains 10 balls numbered from 1 to 10 inclusive. If Ann removes a ball at random and replaces it, and then Jane removes a ball at random, what is the probability that both women removed the same ball?
285 For all numbers a and b, the operation is defined by$a\oplus b = a^{2} - ab. If xy \neq 0$, then which of the following can be equal to zero?I. $x\oplus y$II. $xy\oplus y$III. $x\oplus (x + y)$
286 There are 10 employees in an office, not counting the office manager. The table shows how many employees have 0, 1, 2 or 3 pets. If the office manager also were included in the table, the average (arithmetic mean) number of pets per person would equal the median number of pets per person. How many pets does the office manager have? 287 If an object travels 100 feet in 2 seconds, what is the object's approximate speed in miles per hour? (Note: 1 mile = 5280 feet)
288 A: {71,73,79,83,87} B:{57,59,61,67}If one number is selected at random from set A, and one number is selected at random from set B, what is the probability that both numbers are prime?
289 Six children—A, B, C, D, E, and F—are going to sit in six chairs in a row. Child E must be somewhere to the left of child F. How many possible configurations are there for the children?
290 Set A: {1, 3, 4, 6, 9, 12, 15}If three numbers are randomly selected from set A without replacement, what is the probability that the sum of the three numbers is divisible by 3?
291 If the numbers $\frac{19}{36}, \frac{5}{11}, \frac{12}{25},\frac{ 6}{11}, and \frac{8}{18}$ were arranged from least to greatest, which number would be in the middle?
292 The average (arithmetic mean) of 4 different integers is 75. If the largest integer is 90, what is the least possible value of the smallest integer?
293 $8^{16}+16^{13}+4^{24}$=
294 In how many different ways can 3 boys and 3 girls be seated in a row of 6 chairs such that the girls are not separated, and the boys are not separated?
295 The units digit of$(137^{13})^{47}$ is:
296 A division of a company consists of seven men and five women. If three of these twelve employees are randomly selected as representatives of the division, what is the probability that the representatives will consist of two females and one male?
297 A sphere is surrounded by the smallest cylinder that will just contain it. Which of following is a complete set of the points where the cylinder touches the sphere?I. One pointII. Two pointsIII. A Circle
298 If for some value of x, $5^{x} + 5^{–x} = B$, then which of the following is equal to $25^{x} + 25^{–x}$?
299 The ratio of two positive numbers is 3 to 4. If k is added to each number the new ratio will be 4 to 5, and the sum of the numbers will be 117. What is the value of k?
300 If a rectangle has perimeter of 20 and a diagonal with length 9, what is the area of the rectangle?

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