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65. Is |x-z|>|x-y|? 1). |z|>|y| 2). 0>x E 66. The average of 5 numbers is 62, what is the range of the numbers? 1). The average of the 4 largest numbers is 74 2). The average of the 4 smallest numbers is 40 C 由1）求出最小的数，由2）求出最大的数 67. Of the 114 people surveyed, 70 can speak English, 40 can speak French. If the number of people can speak neither English nor French is 3 times the number of the people who can speak both, how many people can speak both two languages? 设为x，则： 114-3x=70+40-x X=2 68. Of the 360 economists, 75% invested in stock market, 40% invested in bond market, and 15% invested neither stock nor bond. How many of them invested only in stock market? 都投资的：360*（75%+40%）-360+360*15%=360*30% 只投资在股票上的360*（75%-30%）=162 69. Five students, A, B, C , D, and E stand in a line together. If A cannot stand at either the front or the back of the line, and B must stand in the middle. How many more combinations would there be if B can stand anywhere on the line? B可以任意站的排列：P55-2P44 B只能站中间的排列P44-2P33 相减就有P55-3P44+2P33=60 70. List A contains integers from 5 to 200, inclusive; list B contains integers from -1 to -200. What is the sum of A and B? -1-2-3-4=-10 71. If the smallest number in a set of positive integers is 3, how many numbers does the set have? 1). The average of the set is 6 2). The range of the set is equal to the average of the set E如果题中有说是连续整数的话就该D 72. If the positive integer q is a perfect cube, what is the value of q? 1). 1000>q>600 2). q is an odd number. A 73. If x>-1, and 1/x^2 + 1/(x^2-4)=0, x will fall in which of the following ranges? Answer: between 1 and 2 74. If n is an integer, x=? 1). 9^n = 100,000*X 2). 1/10 <x<1 C 75. A rectangular carton that measures 25 inches by 40 inches by 60 inches is covered with some materials as protection. If the material is one inch thick, what is the volume of this material? 27*42*62-25*40*60 76. A sequence, a1=t, a2=4a1^2, a3=4a2^2. Then, a4=? 47t8
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