SAT阅读素材 unsolved math problems
<p> 提高<span word="SAT">SAT</span>阅读水平的一个必用的方法就是经常找一些<span word="SAT">SAT</span>阅读素材进行练习，培养语感和阅读速度，不懂的词汇要养成根据上下文的意思进行猜词的习惯，之后再查词典，而不是一开始就查。读的时候不要一个单词一个单词的读，而是按意群来阅读，这样才有助于你<span word="SAT">SAT</span>阅读水平的提高。</p><p> <span word="There">There</span> <span word="are">are</span> <span word="many">many</span> <span word="unsolved">unsolved</span> <span word="problems">problems</span> <span word="in">in</span> <span word="mathematics">mathematics</span>. <span word="Some">Some</span> <span word="prominent">prominent</span> <span word="outstanding">outstanding</span> <span word="unsolved">unsolved</span> <span word="problems">problems</span> <span word="include">include</span></p><p> 1. <span word="The">The</span> <span word="Goldbach">Goldbach</span> <span word="conjecture">conjecture</span>.</p><p> 2. <span word="The">The</span> <span word="Riemann">Riemann</span> <span word="hypothesis">hypothesis</span>.</p><p> 3. <span word="The">The</span> <span word="conjecture">conjecture</span> <span word="that">that</span> <span word="there">there</span> <span word="exists">exists</span> <span word="a">a</span> <span word="Hadamard">Hadamard</span> <span word="matrix">matrix</span> <span word="for">for</span> <span word="every">every</span> <span word="positive">positive</span> <span word="multiple">multiple</span> <span word="of">of</span> 4.</p><p> 4. <span word="The">The</span> <span word="twin">twin</span> <span word="prime">prime</span> <span word="conjecture">conjecture</span> .</p><p> 5. <span word="Determination">Determination</span> <span word="of">of</span> <span word="whether">whether</span> <span word="NP">NP</span>-<span word="problems">problems</span> <span word="are">are</span> <span word="actually">actually</span> <span word="P">P</span>-<span word="problems">problems</span>.</p><p> 6. <span word="The">The</span> <span word="Collatz">Collatz</span> <span word="problem">problem</span>.</p><p> 7. <span word="Proof">Proof</span> <span word="that">that</span> <span word="the">the</span> 196-<span word="algorithm">algorithm</span> <span word="does">does</span> <span word="not">not</span> <span word="terminate">terminate</span> <span word="when">when</span> <span word="applied">applied</span> <span word="to">to</span> <span word="the">the</span> <span word="number">number</span> 196.</p><p> 8. <span word="Proof">Proof</span> <span word="that">that</span> 10 <span word="is">is</span> <span word="a">a</span> <span word="solitary">solitary</span> <span word="number">number</span>.</p><p> 9. <span word="Finding">Finding</span> <span word="a">a</span> <span word="formula">formula</span> <span word="for">for</span> <span word="the">the</span> <span word="probability">probability</span> <span word="that">that</span> <span word="two">two</span> <span word="elements">elements</span> <span word="chosen">chosen</span> <span word="at">at</span> <span word="random">random</span> <span word="generate">generate</span> <span word="the">the</span> <span word="symmetric">symmetric</span> <span word="group">group</span> .</p><p> 10. <span word="Solving">Solving</span> <span word="the">the</span> <span word="happy">happy</span> <span word="end">end</span> <span word="problem">problem</span> <span word="for">for</span> <span word="arbitrary">arbitrary</span> .</p><p> 11. <span word="Finding">Finding</span> <span word="an">an</span> <span word="Euler">Euler</span> <span word="brick">brick</span> <span word="whose">whose</span> <span word="space">space</span> <span word="diagonal">diagonal</span> <span word="is">is</span> <span word="also">also</span> <span word="an">an</span> <span word="integer">integer</span>.</p><p> 12. <span word="Proving">Proving</span> <span word="which">which</span> <span word="numbers">numbers</span> <span word="can">can</span> <span word="be">be</span> <span word="represented">represented</span> <span word="as">as</span> <span word="a">a</span> <span word="sum">sum</span> <span word="of">of</span> <span word="three">three</span> <span word="or">or</span> <span word="four">four</span> <span word="cubic">cubic</span> <span word="numbers">numbers</span>.</p>
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