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题目： Is zw positive? (1) $$z + w^{3} = 20$$ (2) z is positive.

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题目： On the scale drawing of a certain house plan, if 1 centimeter represents x meters, what is the value of x ? (1) A rectangular room that has a floor area of 12 square meters is represented by a region of area 48 square centimeters. (2) The 15-meter length of the house is represented by a segment 30 centimeters long.

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题目： In a school that had a total of 600 students enrolled in the junior and senior classes, the students contributed to a certain fund. If all of the juniors but only half of the seniors contributed, was the total amount contributed more than $ 740? (1) Each junior contributed $1 and each senior who contributed gave $3. (2) There were more juniors than seniors enrolled in the school.

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题目： How much did credit-card fraud cost United States banks in year X to the nearest $10 million? ( 1) In year X, counterfeit cards and telephone and mail-order fraud accounted for 39 percent of the total amount that card fraud cost the banks. (2) In year X, stolen cards accounted for $158.4 million, or 16 percent, of the total amount that credit-card fraud cost the banks.

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题目： Is the positive integer n odd? (1) $$n^{2} + {n+1}^{2} + {n+1}^{2} $$is even. (2) $$n^{2} - {n+1}^{2} + {n+1}^{2} $$is even.

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题目： In the xy-plane, circle C has center (1,0) and radius 2. If line k is parallel to the y-axis, is line k tangent to circle C? (1) Line k passes through the point (-1,0). (2) Line k passes through the point (-1,-1).

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题目： A window is in the shape of a regular hexagon with each side of length 80 centimeters. If a diagonal through the center of the hexagon is w centimeters long, then w =

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题目： In the figure shown, PQRSTU is a regular polygon with sides of length x. What is the perimeter of triangle PRT in terms of x ?

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题目： In a certain medical survey, 45 percent of the people surveyed had the type A antigen in their blood and 3 percent had both the type A antigen and the type B antigen. Which of the following is closest to the percent of those with the type A antigen who also had the type B antigen?

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题目： If x and k are integers and $$(12^{x})(4^{2x+1}) = (2^{k})(3^{2})$$, what is the value of k ?

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题目： If S is the sum of the reciprocals of the 10 consecutive integers from 21 to 30, then Sis between which of the following two fractions?

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题目： In pentagon PQRST, $$PQ = 3$$, $$QR= 2$$, $$RS= 4$$, and $$ST= 5$$. Which of the lengths 5, 10, and 15 could be the value of PT ?

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题目： 3, k, 2, 8, m, 3 The arithmetic mean of the list of numbers above is 4. If k and m are integers and $$ k\neq m$$, what is the median of the list?

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题目： If the variables, X, Y, and Z take on only the values 10, 20, 30, 40, 50, 60, or 70 with frequencies indicated by the shaded regions above, for which of the frequency distributions is the mean equal to the median?

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题目： When the figure above is cut along the solid lines, folded along the dashed lines, and taped along the solid lines, the result is a model of a geometric solid. This geometric solid consists of 2 pyramids, each with a square base that they share. What is the sum of the number of edges and the number of faces of this geometric solid?