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OG15 OG16 OG17 OG18 OG19 OG20 OG2022 At his regular hourly rate, Don had estimated the labor cost of a repair job as $336 and he was paid that amount. However, the job took 4 hours longer than he had estimated and, consequently, he earned $2 per hour less than his regular hourly rate. What was the time Don had estimated for the job, in hours?
OG12 OG15 OG16 OG17 OG18 OG19 OG20 OG2022 In a small snack shop, the average (arithmetic mean) revenue was $400 per day over a 10-day period. During this period, if the average daily revenue was $360 for the first 6 days, what was the average daily revenue for the last 4 days?
OG18 OG19 OG20 OG2022 If a is a 3-digit integer and b is a 3-digit integer, is the units digit of the product of a and b greater than 5? (1) The units digit of a is 4 (2) The units digit of b is 7.
OG20 OG2022 If a building has 6,000 square meters of floor space, how many offices are in the building? 1.Exactly $$\frac{1}{4}$$ of the floor space is not used for offices. 2.There are exactly 20 executive offices and each of these occupies 3 times as much floor space as the average for all of the remaining offices.
OG12 OG15 OG16 OG17 OG18 OG19 OG20 OG2022 At what speed was a train traveling on a trip when it had completed half of the total distance of the trip?(1)The trip was 460 miles long and took 4 hours to complete.(2)The train traveled at an average rate of 115 miles per hour on the trip.
OG12 OG15 OG16 OG17 OG18 OG19 OG20 OG2022 Material A costs $3 per kilogram, and material B costs $5 per kilogram. If 10 kilograms of material K consists of x kilograms of material A and y kilograms of material B, is x > y?(1)y > 4(2)The cost of the 10 kilograms of material K is less than $40.
应用题 Of the books standing in a row on a shelf, an atlas is the 30th book from the left and the 33rd book from the right. If 2 books to the left of the atlas and 4 books to the right of the atlas are removed from the shelf, how many books will be left on the shelf?
OG15 OG16 OG17 OG18 OG19 OG20 OG2022 Seven pieces of rope have an average (arithmetic mean) length of 68 centimeters and a median length of 84 centimeters. If the length of the longest piece of rope is 14 centimeters more than 4 times the length of the shortest piece of rope, what is the maximum possible length, in centimeters, of the longest piece of rope?
OG19 OG20 OG2022 The symbol $$\Delta$$ denotes one of the four arithmetic operations: subtraction, multiplication, or division. If 6 $$\Delta$$ 3 $$\le$$ 3, which of the following must be true? I. 2 $$\Delta$$ 2=0 II. 2 $$\Delta$$ 2=1 III. 4 $$\Delta$$ 2=2
190310
The pulley has three wheels A, B and C. Circle A has a radius of 2. Circle B has a radius of 4. Circle C has a radius of 8. If circle A rotates 3 turns counterclockwise, how many turns does circle B and circle C rotate in total?
190124 还原机经选题: 文字题&几何 The pulley has three wheels A, B and C. Circle A has a radius of 2. Circle B has a radius of 4. Circle C has a radius of 6. If circle A rotates 1.5 turns counterclockwise, how many turns does circle B and circle C rotate in total?
181215 Two classes play 10 games, and the scores of the two classes are shown in the table below. Is the average score of class A higher than that of class B? 1: The minimum scores of each classes are 0. 2: f=4.
181215 There is an even chain hanging on a pulley. The chain is 5 meters long and weighs 4 kilograms. The chain lengths on the left and right sides of the pulley are a and b respectively. b=？ 1: a = 1 m 2: r = 0.3 m
Ready4

Is the positive integer a multiple of 48?

(1) is a multiple of 4.

(2) is a multiple of 12.
Ready4

If Vince works 4 hours at a museum and earns dollars per hour, and he works 6 hours at an office and earns dollars per hour, what is the average amount, in dollars, that Vince earns per hour?
OG16 OG17 OG18 OG19 OG20 OG2022 A three-digit code for certain logs uses the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 according to the following constraints. The first digit cannot be 0 or 1, the second digit must be 0 or 1, and the second and third digits cannot both be 0 in the same code. How many different codes are possible?
OG17 OG18 OG19 OG20 OG2022 If there are fewer than 8 zeros between the decimal point and the first nonzero digit in the decimal expansion of $$(\frac{t}{1000})^{4}$$, which of the following numbers could be the value of t?I. 3II. 5III. 9
OG12 OG15 OG16 OG17 OG18 OG19 OG20 OG2022 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?
OG19 OG20 OG2022 if a certain vase contains only roses and tulips, how many tulips are there in the vase? (1 )The number of roses in the vase is 4 times the number of tulips in the vase . (2)There is a total of 20 flowers in the vase.
OG19 OG20 OG2022 A company bought 3 printers and 1 scanner. What was the price of the scanner? (1)The total price of the printers and the scanner was $1, 300. (2)The price of each printer was 4 times the price of the scanner.