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题目： P and Q are both positive integers. When P is divided by Q, the remainder is some positive integer D, and when P is divided by (Q + 3), the remainder is also D. If $$\frac{P}{Q}$$ = 1020.75 and$$\frac{ P}{(Q + 3)}$$ = 816.6, then which of the following gives the correct set of {D, Q}?

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题目： Noelle walks from point A to point B at an average speed of 5 kilometers per hour. At what speed, in kilometers per hour, must Noelle walk from point B to point A so that her average speed for the entire trip is 6 kilometers per hour?

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题目： On a long drive, a truck covered P percent of the total distance on local road, where it drove only 30 mph. The rest of the trip, it traveled at 50 mph. In terms of P, which of the following represents the average velocity of the entire trip?

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题目： 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?

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题目： 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. $$x\oplus (x + y)$$

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题目： $$(1\frac{4}{5})^{2}$$=

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题目： When a company places a wholesale order on coffee cups with the company logo, they pay $692 for 80 cups. When Phil wants to buy just one such cup, it costs him $12.50. How much above the wholesale price per cup is he paying?

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题目： The average (arithmetic mean) of two numbers is 4x. If one of the numbers is y, then the value of the other number is

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题目： If 4x = 14 and xy = 1 then y =

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题目： The price of a pair of sneakers was $80 for the last six months of last year. On January first, the price increased 20%. After the price increase, an employee bought these sneakers with a 10% employee discount. What price did the employee pay?

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题目： If it takes Bill 8 minutes to peel 30 potatoes, how many potatoes can he peel in one hour?

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题目： $${8*10^{40}}\over1*10^{10}$$=

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题目： $$(2xy^{2})*(7x^{3}y^{3})$$=

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题目： $$(5\frac{5}{8})\over(4\frac{1}{2})$$=

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题目： To attend the Barnaby Dance, Sarah must buy new shoes for $47, a new earrings for $16, and a ticket to the dance for $25. If there will be an 8% tax on the shoes & earrings, what is the total amount Sarah must pay?