真题汇总:12月16日gre数学真题部分
<p> <span word="Wednesday">Wednesday</span>, <span word="December">December</span> 16, 2009</p><p> 1. <span word="If">If</span> ^ + ^ = 0 <span word="and">and</span> <span word="ab">ab</span> <span word="is">is</span> <span word="not">not</span> <span word="equal">equal</span> <span word="to">to</span> <span word="zero">zero</span>, <span word="then">then</span> <span word="what">what</span> <span word="is">is</span> <span word="the">the</span> <span word="value">value</span> <span word="of">of</span> ^2?</p><p> 2. <span word="Col">Col</span> <span word="A">A</span>: <span word="The">The</span> <span word="number">number</span> <span word="of">of</span> <span word="ways">ways</span> <span word="of">of</span> <span word="forming">forming</span> <span word="different">different</span> <span word="groups">groups</span> <span word="of">of</span> 2 <span word="kittens">kittens</span> <span word="each">each</span> <span word="from">from</span> 8 <span word="kittens">kittens</span></p><p> <span word="Col">Col</span> <span word="B">B</span>: <span word="The">The</span> <span word="number">number</span> <span word="of">of</span> <span word="ways">ways</span> <span word="of">of</span> <span word="forming">forming</span> <span word="different">different</span> <span word="groups">groups</span> <span word="of">of</span> 6 <span word="kittens">kittens</span> <span word="each">each</span> <span word="from">from</span> 8 <span word="kittens">kittens</span></p><p> 3. <span word="Col">Col</span> <span word="A">A</span>: <span word="sqrt">sqrt</span> + <span word="sqrt">sqrt</span></p><p> <span word="Col">Col</span> <span word="B">B</span>: <span word="sqrt">sqrt</span> + <span word="sqrt">sqrt</span></p><p> 4. <span word="Given">Given</span> <span word="x">x</span> <span word="is">is</span> <span word="not">not</span> <span word="equal">equal</span> <span word="to">to</span> 0, <span word="y">y</span> <span word="is">is</span> <span word="not">not</span> <span word="equal">equal</span> <span word="to">to</span> 0 <span word="and">and</span> <span word="xy">xy</span> <span word="is">is</span> <span word="not">not</span> <span word="equal">equal</span> <span word="to">to</span> 0.</p><p> <span word="Col">Col</span> <span word="A">A</span>: 1/</p><p> <span word="Col">Col</span> <span word="B">B</span>: 1/^3</p><p> 5. <span word="Given">Given</span> <span word="a">a</span> <span word="line">line</span> <span word="equation">equation</span> <span word="y">y</span> = <span word="ax">ax</span>+<span word="b">b</span>. <span word="If">If</span> <span word="x">x</span>-<span word="intercept">intercept</span> <span word="is">is</span> 5 <span word="and">and</span> <span word="slope">slope</span> <span word="is">is</span> 2, <span word="then">then</span></p><p> <span word="Col">Col</span> <span word="A">A</span>: <span word="y">y</span>-<span word="intercept">intercept</span></p><p> <span word="Col">Col</span> <span word="B">B</span>: -10</p><p> 6. <span word="Given">Given</span> <span word="a">a</span> <span word="set">set</span> <span word="of">of</span> <span word="numbers">numbers</span>: {10, 11, 12, 15, 15, 15, 17, 19, 20, 20}. <span word="If">If</span> <span word="a">a</span> <span word="number">number</span> 15 <span word="is">is</span> <span word="included">included</span> <span word="in">in</span> <span word="the">the</span> <span word="series">series</span>, <span word="then">then</span> <span word="which">which</span> <span word="of">of</span> <span word="the">the</span> <span word="following">following</span> <span word="will">will</span> <span word="change">change</span>?</p><p> <span word="A">A</span>. <span word="Mean">Mean</span></p><p> <span word="B">B</span>. <span word="Median">Median</span></p><p> <span word="C">C</span>. <span word="Mode">Mode</span></p><p> <span word="D">D</span>. <span word="Standard">Standard</span> <span word="deviation">deviation</span></p><p> <span word="E">E</span>. <span word="None">None</span></p><p> 7. <span word="Given">Given</span> <span word="total">total</span> = <span word="n">n</span> <span word="p">p</span>. <span word="If">If</span><span word="is">is</span> <span word="reduced">reduced</span> <span word="by">by</span> 20%, <span word="then">then</span> <span word="by">by</span> <span word="what">what</span> <span word="percentage">percentage</span>,<span word="should">should</span> <span word="be">be</span> <span word="increased">increased</span> <span word="to">to</span> <span word="balance">balance</span> <span word="the">the</span> <span word="total">total</span>?</p><p> 9. <span word="In">In</span> <span word="a">a</span> <span word="set">set</span> <span word="of">of</span> <span word="five">five</span> <span word="consecutive">consecutive</span> <span word="numbers">numbers</span>, <span word="if">if</span> <span word="the">the</span> <span word="greatest">greatest</span> <span word="value">value</span> <span word="is">is</span> <span word="x">x</span> + 5, <span word="then">then</span> <span word="what">what</span> <span word="is">is</span> <span word="the">the</span> <span word="least">least</span> <span word="value">value</span>?</p><p> 10. <span word="Given">Given</span> <span word="two">two</span> <span word="concentric">concentric</span> <span word="circles">circles</span>. <span word="The">The</span> <span word="inner">inner</span> <span word="circle">circle</span> <span word="is">is</span> <span word="a">a</span> <span word="garden">garden</span> <span word="of">of</span> <span word="radius">radius</span> 6<span word="m">m</span> <span word="and">and</span> <span word="the">the</span> <span word="outer">outer</span> <span word="circle">circle</span> <span word="which">which</span> <span word="has">has</span> <span word="a">a</span> <span word="cement">cement</span> <span word="path">path</span> <span word="around">around</span> <span word="the">the</span> <span word="garden">garden</span> <span word="has">has</span> <span word="a">a</span> <span word="radius">radius</span> 8<span word="m">m</span>. <span word="If">If</span> <span word="the">the</span> <span word="width">width</span> <span word="of">of</span> <span word="cement">cement</span> <span word="is">is</span> 0.06, <span word="what">what</span> <span word="is">is</span> <span word="the">the</span> <span word="volume">volume</span> <span word="of">of</span> <span word="the">the</span> <span word="cement">cement</span>? </p>
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