数学试题讨论稿第三篇（66--100）_GMAT数学

　　It sold 190 white shirts and 80 red shirts, how many medium shirts did it sell?

　　SA:200 suppose large red=x lw=y then mr=2y, mw=3x

　　x+2y=80

　　y+3x=80 --- x=60 y=10 --- 2x+3y=200

　　 81. 1/=?

　　SA: -1/ v表示根号

　　82. 13679/10^5)) 的百位数?

　　SA: 4 原式=13679 百位数136790-1367.9

　　83. speed at 72 kilometers per hour. what is the speed in terms of merters per second?

　　SA: 721000/6060=20

　　84. buy one get one half if the second one is less or equal value. The customer buy a second pair

　　of shoes with 65 percent price of the first pair? In total, what percent discount did she get? 算出来时

　　SA: /=0.1969696

　　D.S.

　　85. What is n? the remainder of n devided by 3 is 2 the remainder of n^2 divided by 3 is 1.

　　SA:E 我是试出来的n=3a+2 n^2=3b+1 n=5,8已经都可以了有没有别的解法

　　86. 给了摄氏和华氏的换算公式，is low temperature less than 30F? low temperature is greater than negative 5c low termperature is less than negative 2c

　　SA: B

　　87. 40 miles per hour from A to B and 45 miles/hour from B to A. the distance from A to B?

　　 total time 34 minutes take 2 minutes less from B to A than from A to B

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