最新gre数学难题解析(六)
<p> 下面为大家总结了最新的<span word="gre">gre</span>数学难题。有很多<span word="gre">gre</span>考生对<span word="gre">gre</span>数学考试十分苦恼，其实最有效的方法就是多练习，把数学基础知识记牢，这样才能在考试中对答如流。而<span word="gre">gre</span>数学考试中也会出现一些难题，想拿高分也十分不容易。</p><p> 51.<span word="The">The</span> <span word="percent">percent</span> <span word="increase">increase</span> <span word="from">from</span> <span word="the">the</span> <span word="least">least</span> <span word="monthly">monthly</span> <span word="car">car</span> <span word="sales">sales</span> <span word="shown">shown</span> <span word="to">to</span> <span word="the">the</span> <span word="sales">sales</span> <span word="in">in</span> <span word="July">July</span> 1993 <span word="was">was</span> <span word="most">most</span> <span word="nearly">nearly</span> <span word="equal">equal</span> <span word="to">to</span>____</p><p> <span word="A">A</span>.20% <span word="B">B</span>.35% <span word="C">C</span>.45% <span word="D">D</span>.55% <span word="E">E</span>.65%</p><p> 52. <span word="For">For</span> <span word="which">which</span> <span word="symptom">symptom</span> <span word="are">are</span> <span word="the">the</span> <span word="ratings">ratings</span> <span word="closest">closest</span> <span word="to">to</span> <span word="the">the</span> <span word="arithmetic">arithmetic</span> <span word="mean">mean</span> <span word="for">for</span> <span word="that">that</span> <span word="symptom">symptom</span>, <span word="as">as</span> <span word="measured">measured</span> <span word="by">by</span> <span word="the">the</span> <span word="standard">standard</span> <span word="deviation">deviation</span> <span word="of">of</span> <span word="its">its</span> <span word="ratings">ratings</span>?</p><p> <span word="A">A</span>.<span word="H">H</span> <span word="B">B</span>.<span word="L">L</span> <span word="C">C</span>.<span word="P">P</span> <span word="D">D</span>.<span word="T">T</span> <span word="E">E</span>.<span word="V">V</span></p><p> 53. <span word="The">The</span> <span word="cost">cost</span> <span word="of">of</span> <span word="sending">sending</span> <span word="a">a</span> <span word="package">package</span> <span word="special">special</span> <span word="delivery">delivery</span> <span word="is">is</span> <span word="x">x</span> <span word="cents">cents</span> <span word="per">per</span> <span word="ounce">ounce</span> <span word="up">up</span> <span word="to">to</span> 10 <span word="ounces">ounces</span> <span word="and">and</span> <span word="y">y</span> <span word="cents">cents</span> <span word="for">for</span> <span word="each">each</span> <span word="ounce">ounce</span> <span word="in">in</span> <span word="excess">excess</span> 10. <span word="Which">Which</span> <span word="of">of</span> <span word="the">the</span> <span word="following">following</span> <span word="represents">represents</span> <span word="the">the</span> <span word="total">total</span> <span word="cost">cost</span>, <span word="in">in</span> <span word="cents">cents</span>, <span word="of">of</span> <span word="sending">sending</span> <span word="special">special</span> <span word="delivery">delivery</span> <span word="a">a</span> <span word="package">package</span> <span word="weighing">weighing</span> <span word="w">w</span> <span word="ounces">ounces</span>, <span word="if">if</span> <span word="w">w</span> 10?</p><p> <span word="A">A</span>. <span word="x">x</span>+<span word="y">y</span>+10</p><p> <span word="B">B</span>. <span word="x">x</span>++<span word="y">y</span></p><p> <span word="C">C</span>. 10<span word="x">x</span>+10</p><p> <span word="D">D</span>.10<span word="x">x</span>+<span word="y">y</span></p><p> <span word="E">E</span>. 10<span word="x">x</span>+<span word="wy">wy</span></p><p> 54. <span word="The">The</span> <span word="jewels">jewels</span> <span word="in">in</span> <span word="a">a</span> <span word="certain">certain</span> <span word="tiara">tiara</span> <span word="consist">consist</span> <span word="of">of</span> <span word="diamonds">diamonds</span>, <span word="rubies">rubies</span>, <span word="and">and</span> <span word="emeralds">emeralds</span>. <span word="If">If</span> <span word="the">the</span> <span word="ratio">ratio</span> <span word="of">of</span> <span word="diamonds">diamonds</span> <span word="to">to</span> <span word="rubies">rubies</span> <span word="is">is</span> 5/6 <span word="and">and</span> <span word="the">the</span> <span word="ratio">ratio</span> <span word="of">of</span> <span word="rubies">rubies</span> <span word="to">to</span> <span word="emeralds">emeralds</span> <span word="is">is</span> 8/3, <span word="what">what</span> <span word="is">is</span> <span word="the">the</span> <span word="least">least</span> <span word="number">number</span> <span word="of">of</span> <span word="jewels">jewels</span> <span word="that">that</span> <span word="could">could</span> <span word="be">be</span> <span word="in">in</span> <span word="the">the</span> <span word="tiara">tiara</span>?</p><p> <span word="A">A</span>.16 <span word="B">B</span>.22<span word="C">C</span>.40<span word="D">D</span>.53<span word="E">E</span>.67</p><p> 55.<span word="Column">Column</span> <span word="A">A</span>: <span word="The">The</span> <span word="area">area</span> <span word="of">of</span> <span word="the">the</span> <span word="triangular">triangular</span> <span word="region">region</span>.</p>
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