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R, S, T, and U are points on a line, and U is the midpoint of line segment ST. If the lengths of line segments RS, RT, and ST are 20, 4, and 24, respectively. What is the length of line segment RU?
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Ms. Li must choose a passcode for her bank account. The passcode is to consist of 4 different digits from 0 to 9 inclusive except the first digit must be odd. How many different combinations for the passcode are there?
PREP07 Test 1 What is the number of members of Club X who are at least 35 years of age?(1)Exactly $$\frac3 4$$ of the members of Club x are under 35 years of age.(2)The 64 women in Club x constitute 40 percent of the club's membership.
The results of a certain experiment included 6 data values that were all multiples of the same number c, namely, c, 8c, 2c, 5c, 4c, and 4c. Was the average (arithmetic mean) of the 6 data values greater than 8?(1)c < 4(2)c > 2
OG12 GMAT、gmat题库、gmat模考、gmat考满分Data for a certain biology experiment are given in the table above. If the amount of bacteria present increased by the same fraction during each of the two 3-hour periods shown, how many grams of bacteria were present at 4:00 P.M.?
PREP07 Test 1 If l and k are lines in the xy-plane, is the product of the slopes of l and k equal to -1 ?(1) Line l passes through the origin and the point (1, 2).(2) Line k has x-intercept 4 and y-intercept 2.
Magoosh The numbers a, b, c, and d are all positive, and J = $$\frac{a}{b}$$ and K = $$\frac{c}{d}$$. Is J greater than K?Statement #1: a < b, c < d, and c > aStatement #2: a + 7 = c and b + 4 = d
Magoosh If 4 < A < 6, n and m are positive integers with n > m, and T = A x $$10^n$$, then what is the value of T?Statement #1: $$\sqrt {A*10^m}$$=23100Statement #2: n – m = 7
OG19-数学分册 When 24 is divided by the positive integer n, the remainder is 4. Which of the following statements about n must be true? I. n is even. II. n is a multiple of 5. Ill. n is a factor of 20.
OG17 OG18 OG19 OG20 OG2022 GMAT、gmat题库、gmat模考、gmat考满分The table shows the numbers of packages shipped daily by each of five companies during a 4-day period. The standard deviation of the numbers of packages shipped daily during the period was greatest for which of the five companies?
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Two integers will be randomly selected, one integer from set and one integer from set . What is the probability that the sum of the two integers will equal ?

(1)

(2)

Magoosh In the rectangular coordinate system, line k is defined by the equation x - 2y + n = 0. What is the value of n?(1) The x-intercept of line k is 8.(2) The y-intercept of line k is -4.
Magoosh If n = 2*3*5*7*11*13*17, then which of the following statements must be true?I. $$n^{2}$$ is divisible by 600 II. n + 19 is divisible by 19III.$$\frac{n+4}{2}$$ is even
PREP07 Test 1 In the xy-coordinate plane, the slope of line l is $$\frac34$$ . Does line l pass through the point (- 2/3 , 1/2 )?(1) Line l passes through the point (4,4).(2) Line l passes through the point (-4,-2).
排列组合 A company has assigned a distinct 3-digit code number to each of its 330 employees. Each code number was formed from the digits 2, 3, 4, 5, 6, 7, 8, 9 and no digit appears more than once in any one code number. How many unassigned code numbers are there?
OG17 OG18 OG19 OG20 OG2022 On a vacation, Rose exchanged $500.00 for euros at an exchange rate of 0.80 euro per dollar and spent $$\frac{3}{4}$$ of the euros she received. If she exchanged the remaining euros for dollars at an exchange rate of $1.20 per euros, what was the dollar amount she received?
191222 One person works 12 yuan an hour, 35 hours at most, if she works more than 35 hours, the hourly wage will increase by 50%. She said that if she works 4 hours more this month, she will get 60 yuan more. How many hours did she work this month?
190302 The distance from an asteroid to earth is 3.8*$$10^{5}$$m. The distance between the moon and the earth is 4*$$10^{2}$$m. The distance from the asteroid on a map to the earth is 1.9cm. What is the distance from the moon to the earth on the map?
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What is the difference between the twelfth and eleventh terms of the sequence 0, 0, 1, 4, 11 ... whose th term is ?
Of the mutual funds on a select list, $$\frac{1}{3}$$ have 5-star ratings, and $$\frac{2}{5}$$ of the remaining funds have 4-star ratings. If the remaining 300 funds on the list have 3-star ratings, how many funds are on the list?