GMAT数学备考资料：练习+讲解（11）
<p> 下面<span word="GMAT">GMAT</span>思为大家整理了<span word="GMAT">GMAT</span>数学备考资料：练习+讲解（11），供考生们参考，以下是详细内容。</p><p> 1、<span word="j">j</span>, <span word="k">k</span>均为<span word="positive">positive</span> <span word="integer">integer</span>, <span word="j">j</span>和<span word="k">k</span>的<span word="greatest">greatest</span> <span word="common">common</span> <span word="divisor">divisor</span>?</p><p> <span word="j">j</span>=<span word="k">k</span>+1;</p><p> <span word="jk">jk</span> <span word="is">is</span> <span word="divisible">divisible</span> <span word="by">by</span> 5;</p><p> 【答案】<span word="A">A</span></p><p> 【思路】</p><p> 两个相邻正整数的最大公约数是1</p><p> <span word="J">J</span>=3，<span word="K">K</span>=15，最大公约数是3;<span word="J">J</span>=5，<span word="K">K</span>=15，最大公约数=5</p><p> 2、已知<span word="AB">AB</span>=<span word="BC">BC</span>=<span word="CD">CD</span>=<span word="DE">DE</span>，且<span word="AE">AE</span>=10，求<span word="AB">AB</span>?</p><p> 【答案】：5</p><p> 【思路】：<span word="AB">AB</span>=<span word="BC">BC</span>=<span word="X">X</span>，所以<span word="AC">AC</span>=<span word="X">X</span>根号2，<span word="CD">CD</span>=<span word="X">X</span>，所以<span word="AD">AD</span>=<span word="X">X</span>根号3，<span word="DE">DE</span>=<span word="X">X</span>，所以<span word="AE">AE</span>=2<span word="X">X</span>=10，所以<span word="X">X</span>=5</p><p> 3、已知下列图表的每一行和每一列中，1，2，3出现且只出现一次，<span word="r">r</span>=?</p><p> <span word="rSt">rSt</span></p><p> <span word="uwx">uwx</span></p><p> <span word="vyZ">vyZ</span></p><p> <span word="w">w</span>+<span word="z">z</span>=6;</p><p> <span word="s">s</span>+<span word="t">t</span>+<span word="u">u</span>+<span word="v">v</span>=6;</p><p> 【答案】<span word="D">D</span></p><p> 【思路】</p><p> 从条件1,得<span word="w">w</span>,<span word="z">z</span>均为3,由于各列,各行不得重复,推出<span word="r">r</span>=3</p><p> 条件2 得出<span word="s">s</span>+<span word="t">t</span>=3,<span word="u">u</span>+<span word="v">v</span>=3得每行剩下的<span word="r">r</span>必为3</p><p> 4、某批商品样式分为<span word="r">r</span>,<span word="d">d</span>两种，形状有大小两种，大的占40%，问<span word="d">d</span>的比例?</p><p> 大中有30%<span word="d">d</span>;</p><p> 小中有40%<span word="d">d</span>;</p><p> 【答案】<span word="C">C</span></p><p> 【思路】</p><p> 大中有30%<span word="d">d</span>，因为不知道小中<span word="d">d</span>占的比例，无法求出<span word="d">d</span>的比例。</p>
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