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题目： On a certain multiple-choice test, 9 points are awarded for each correct answer, and 7 points are deducted for each incorrect or unanswered question. Sally received a total score of 0 points on the test. If the test has fewer than 30 questions, how many questions are on the test?

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题目： $$5\sqrt{2}$$ percent of $${{1}\over\sqrt{200}}$$=

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题目： If∠CFD=85° , then what is the value of x?Note: Figure not drawn to scale

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题目： If the average (arithmetic mean) of x, y and 15 is 9, and the average of x, 2y and 2 is 7, then y =

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题目： If $$9^{2x+5} = 27^{3x-10}$$, then x =

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题目： In a certain school, there are 160 boys and 240 girls. If 15 percent of the boys are left-handed and 25 percent of the girls are left-handed, what percent of the school's entire student population is left-handed?

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题目： The sequence $$a_1$$, $$a_2$$, $$a_3$$.....$$a_n$$...is such that $$a_n=\frac{a_{n-1}+a_{n-2}}{2}$$ for all $${n}\ge{3}$$. If $${a}_{3}$$=4 and $${a}_{5}$$ = 20, what is the value of $${a}_{6}$$ ?

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题目： If $${R}=\frac{P}{Q}$$ , is $$R\le P$$ ? (1) $$P > 50$$ (2) $$0 < Q \le 20$$

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题目： 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.?

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题目： What is the remainder when the two-digit, positive integer x is divided by 3 ?(1)The sum of the digits of x is 5.(2)The remainder when x is divided by 9 is 5.

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题目： What is the value of a? (1) -(a + b) = 2a – b + 9 (2) a + b = 6

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题目： What was Bill's average speed on his trip of 250 miles from New York City to Boston? (1) The trip took Bill 5 hours.(2) At the midpoint of his trip, Bill was going exactly 50 miles per hour.

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题目： 8 cities, including Memphis, are finalists to be chosen to host a political convention. Exactly one city will be chosen to host the convention. What is the probability that Memphis is not chosen?(1) The probability that any one of the 8 cities does not win the competition is 7/8.(2) The probability that Memphis wins the competition is 1/8.

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题目： What percent of x is $$\frac{3}{4}$$?(1) x = 5y(2) y = 10

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题目： If Company X sold 6,000 newspapers last year, how many will it sell this year? (1) Two years ago, Company X sold 5,000 newspapers. (2) Three years ago, Company X sold 4,000 newspapers.