GRE数学考生回忆（5）
<p> <span word="GRE">GRE</span>机经是很有效的<span word="GRE">GRE</span>备考资料，下面为大家讨论了一些新<span word="GRE">GRE</span>数学机经，一起来看一下吧。</p><p> 21、<span word="PS">PS</span>：^2=?</p><p> 答案：3122652</p><p> 22、<span word="DS">DS</span>：三个人决定投资一家公司，一月份<span word="A">A</span>投资了<span word="X">X</span>元，<span word="B">B</span>投资了<span word="Y">Y</span>元，<span word="C">C</span>投资了<span word="Z">Z</span>元，然后他们决定这一年末最后分配利润的时候按照他们投资的钱所占的比例分配，问<span word="A">A</span>获得了多少钱? <span word="A">A</span>后来又投资了2次每次2000元，<span word="B">B</span>后来又投资过一次，<span word="C">C</span>没有再投资过 这年这家公司获得的总利润是11000元</p><p> 分配利润的比例为 <span word="X">X</span>：<span word="Y">Y</span>：<span word="Z">Z</span></p><p> 条件1)：: <span word="Z">Z</span> 利润总数不知，无法确定<span word="A">A</span>获利多少</p><p> 条件2) 总额为11000，3个人的比例为<span word="X">X</span>：<span word="Y">Y</span>：<span word="Z">Z</span> 可以求得 选<span word="B">B</span></p><p> 23 、<span word="A">A</span>一天早上8点从家骑自行车出发，沿着南北向的公路向北走，速度为<span word="x">x</span> <span word="mile">mile</span>/<span word="h">h</span>, 然后8点15分的时候<span word="B">B</span>从同一家出发，开车的，速度为<span word="y">y</span> <span word="mile">mile</span>/<span word="h">h</span>，和<span word="A">A</span>走一样的路线。两人一直走到<span word="B">B</span>追上<span word="A">A</span>为止。然后问下面哪个关于<span word="tA">tA</span>和<span word="tB">tB</span>的式子是对的? 答案具体的式子不记得了，反正都是用<span word="x">x</span>和<span word="y">y</span>的式子表示<span word="tA">tA</span>和<span word="tB">tB</span>。。。 <span word="x">x</span> <span word="tA">tA</span> = <span word="y">y</span> <span word="tB">tB</span></p><p> <span word="tA">tA</span> = <span word="tB">tB</span>+0.25 所以：<span word="tB">tB</span>= <span word="x">x</span>/4 <span word="hours">hours</span> <span word="tA">tA</span>= <span word="tB">tB</span>+0.25= <span word="y">y</span>/4</p><p> 24 、有个数轴，上面有几个点，图在附件里，然后问<span word="A">A</span>点的<span word="reciprocal">reciprocal</span>是哪个点，这题很简单，其它点我都不画了，就画了答案</p>
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