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64. 5329-!-item-!-187;#058&004211 If a < y < z < b, is |y - a | < |y - b | ?
(1) |z - a | < |z - b |
(2) |y - a | < |z - b | 66. 5486-!-item-!-187;#058&004317 If q is a positive integer less than 17 and r is the remainder when 17 is divided by q, what is the value of r ?
(1) q > 10
(2) q = 2k, where k is a positive integer. C?? 79. 7535-!-item-!-187;#058&005487 If n is an integer between 2 and 100 and if n is also the square of an integer, what is the value of n ?
(1) n is even.
(2) The cube root of n is an integer.
80. 7589-!-item-!-187;#058&005492 If x and y are positive integers such that x = 8y + 12, what is the greatest common divisor of x and y ?
(1) x = 12u, where u is an integer.
(2) y = 12z, where z is an integer.
93. 8624-!-item-!-187;#058&006485 The lifetimes of all the batteries produced by a certain company in a year have a distribution that is symmetric about the mean m. If the distribution has a standard deviation of d, what percent of the distribution is greater than m + d ?
(1) 68 percent of the distribution lies in the interval from m - d to m + d, inclusive.
(2) 16 percent of the distribution is less than m - d. | 
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发表于 2009-3-21 04:49:00
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