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OG19-定量推理	If a, b, and c are consecutive integers and 0 < a < b < c, is the product abc a multiple of 8 ? (1) The product ac is even. (2) The product be is a multiple of 4.
OG19-定量推理	M and N are integers such that 6 < M < N. What is the value of N? (1) The greatest common divisor of M and N is 6. (2) The least common multiple of M and N is 36.
OG19-定量推理	Stations X and Y are connected by two separate, straight, parallel rail lines that are 250 miles long. Train P and train Q simultaneously left Station X and Station Y, respectively, and each train traveled to the other's point of departure. The two trains passed each other after traveling for 2 hours. When the two trains passed, which train was nearer to its destination? (1) At the time when the two trains passed, train P had averaged a speed of 70 miles per hour. (2) Train Q averaged a speed of 55 miles per hour for the entire trip.
OG19-数学分册	In the xy-plane shown, the shaded region consists of all points that lie above the graph of $$y = x^{2} - 4x$$ and below the x-axis. Does the point (a,b) (not shown) lie in the shaded region if b < 0 ? (1) 0<$$a$$<4 (2) $$a^{2}- 4a < b$$
OG19-定量推理	If a and bare positive integers, is $$\sqrt[3]{ab}$$ an integer? (1) $$\sqrt{a}$$ is an integer. (2) b= $$\sqrt{a}$$
OG19-定量推理	If a and b are positive integers, is $$\sqrt[3]{ab}$$ an integer?(1) $$\sqrt{a}$$ is an integer.(2) $$b = \sqrt{a}$$

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