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首页   >   题库   >   题库列表
700-730   题数：29
In the rectangular coordinate system, are the points (r, s) and (u, v) equidistant from the origin?(1) r + s = 1(2) u = 1 - r and v = 1 - s.
On her way home from work, Janet drives through several tollbooths. Is there a pair of these tollbooths that are less than 10 miles apart? (1) The first tollbooth and the last tollbooth are 25 miles apart. (2) Janet drives through 4 tollbooths on her way home from work.
Each of the 25 balls in a certain box is either red, blue, or white and has a number from 1 to 10 painted on it. If one ball is to be selected at random from the box, what is the probability that the ball selected will either be white or have an even number painted on it? (1) The probability that the ball will both be white and have an even number painted on it is 0. (2) The probability that the ball will be white minus the probability that the ball will have an even number painted on it is 0.2.
If y is an integer and y = |x | + x, is y = 0 ?(1) x < 0(2) y < 1
d = 0.43t7If t denotes the thousandths digit in the decimal representation of d above, what digit is t ?(1) If d were rounded to the nearest hundredth, the result would be 0.44.(2) If d were rounded to the nearest thousandth, the result would be 0.436.
In the xy-plane, point P has coordinates (a, b) and point Q has coordinates (c, d). What is the distance between P and Q ?(1) b - d = 4(2) a - c = 3
A box contains 10 light bulbs, fewer than half of which are defective. Two bulbs are to be drawn simultaneously from the box. If n of the bulbs in box are defective, what is the value of n?(1) The probability that the two bulbs to be drawn will be defective is 1/15.(2) The probability that one of the bulbs to be drawn will be defective and the other will not be defective is 7/15.
Each employee of Company Z is an employee of either Division X or Division Y, but not both. If each division has some part-time employees, is the ratio of the number of full-time employees to the number of part-time employees greater for Division X than for Company Z ? (1) The ratio of the number of full-time employees to the number of part-time employees is less for Division Y than for Company Z. (2) More than half of the full-time employees of Company Z are employees of Division X, and more than half of the part-time employees of Company Z are employees of Division Y.
If n is a positive integer, is n3-n divisible by 4 ?(1) n = 2k + 1, where k is an integer.(2) n2 + n is divisible by 6.
Is 5k less than 1,000 ?(1) 5k + 1 > 3,000(2) 5k-1 = 5k -500
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