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题目： Of the 32 houses on John Street, 10 are big houses and the rest are little. How many of the little houses on John Street are pink?(1) All of the houses on John Street are either pink or blue. (2) There are 14 pink houses on John Street.

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题目： Ivan operates an ice cream stand in the summertime, selling exclusively chocolate, vanilla and strawberry cones. On a recent afternoon, the ratio of chocolate to vanilla to strawberry cones sold by Ivan was 6 : 3 : 2. How many cones did Ivan sell on that afternoon? (1) Ivan sold 24 vanilla cones.(2) Ivan sold twice as many chocolate cones as vanilla cones.

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题目： Is pq > 0?(1) p < 0(2) q < 0

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题目： What is the largest angle in triangle ABC?(1) The sum of angles A and B is 70 degrees.(2) Angle C is 110 degrees.

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题目： Is a + b > c + d ?(1) a > c(2) d < b

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题目： The sum of n consecutive positive integers is 45. What is the value of n?(1) n is even(2) n < 9

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题目： The average (arithmetic mean) height of five of Peter's friends is 70 inches. What will be the new average height if Peter is included in the group? (1) Peter's height is 1 foot greater than the average height of his five friends (1 foot = 12 inches). (2) Peter is 5 inches taller than the tallest of his five friends.

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题目： A tire store offered customers a 25 percent rebate on all tires purchased during a certain weekend. Assuming all customers who purchased tires received rebates, what is the total amount that the tire manufacturer paid out in rebates? (1) On Saturday, the store had $900 in tire sales, and total tire sales doubled on Sunday. (2) For the entire weekend, the store had a total of $2,700 in tire sales.

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题目： What is 20% of 3x? (1) 40% of 6x equals 12(2) 20x = 15x + 25

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题目： If 3 years ago Jennifer was 22 years old, how old is Carmen now? (1) 10 years ago, Carmen was twice as old as Jennifer. (2) 10 years from today, Carmen will be 15 years older than Jennifer.

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题目： What is 11% of x? (1) $$\frac{3}{8}$$ of x is 24(2) 5% of x is 3.2

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According to some botanists, invasive plants are the second most serious threat, after habitat loss, to native species of plants and animals and to the maintenance of biologically diverse ecosystems.

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题目： During the eighteenth century, widespread changes in agriculture, known as the agrarian revolution, involving the large-scale introduction of enclosed fields, of new farming techniques and crops, and the substitution of commercial for subsistence farming.

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The relative prosperity of the first years of the twentieth century came to a halt in 1907 when drains on the money supply, revealing a weak national financial infrastructure of banking and credit, it precipitated an economic crisis that lasted nearly a year.

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The most vexing problem faced by researchers exploring wind-powered generation of electricity is achieving a constant flow of power from an unpredictable natural source that meets demand, but so the flow does not overload electrical grids with sudden voltage increases.