GRE数学常见疑难问题解析
<p> 1.从2 3 4 5 6 7 8 9中取数字组成三位数号码，<span word="assign">assign</span> <span word="to">to</span> 330 <span word="employee">employee</span>, 数字不重复， 问多少号码<span word="unassigned">unassigned</span></p><p> 解：<span word="P">P</span>==336</p><p> 336-330=6</p><p> 2.一个工作<span word="W">W</span>，<span word="X">X</span>做要比<span word="Y">Y</span>做少两天，<span word="X">X</span>，<span word="Y">Y</span>一起做4/3<span word="W">W</span>要3天，求<span word="X">X</span>单独做2<span word="W">W</span>要几天?</p><p> 解：令<span word="W">W</span>/<span word="X">X</span>=<span word="x">x</span>，<span word="W">W</span>/<span word="Y">Y</span>=<span word="y">y</span>，则<span word="x">x</span>+2=<span word="y">y</span></p><p> /=3</p><p> 两式连立化去<span word="y">y</span>，即可解得<span word="x">x</span></p><p> 3.=2^<span word="x">x</span>3^<span word="y">y</span>5^<span word="z">z</span> 代表的是<span word="n">n</span>的函数，<span word="x">x</span>,<span word="y">y</span>,<span word="z">z</span>,都是<span word="positive">positive</span> <span word="integer">integer</span>, <span word="and">and</span> <span word="x">x</span>,<span word="y">y</span>,<span word="z">z</span>,分别代表<span word="n">n</span>的百位，十位和个位，问如果<span word="f">f</span>=9<span word="f">f</span>，<span word="m">m</span>-<span word="v">v</span>=</p><p> 解：因为<span word="f">f</span>=9<span word="f">f</span>，所以两数百位个位都相同，令<span word="a">a</span>为<span word="m">m</span>的十位，<span word="b">b</span>为<span word="n">n</span>的十位则可知，/=9</p><p> 解得<span word="a">a</span>-<span word="b">b</span>=2</p><p> 所以<span word="m">m</span>-<span word="v">v</span>=210=20</p><p> 4.10的<span word="n">n</span>次方减38所得数的<span word="digit">digit</span> <span word="sum">sum</span> 为350. <span word="n">n</span>=</p><p> 解：9+=350</p><p> 5.1到<span word="n">n</span>是连续整数， 1到<span word="n">n</span> 数的乘积能被990 整除， 问<span word="n">n</span> 最少是?</p><p> 解：990=11109，所以<span word="n">n</span>不能小于11。</p><p> 以上就是对于<span word="GRE">GRE</span>数学考试疑难问题的解析，正在备考此类考试的考生，建议大家还是应该要对这类信息进行重点的掌握。</p><p> </p>
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