When the decimal point of a certain positive decimal number is moved six places to the left, the resulting number is 9 times the

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问题 When the decimal point of a certain positive decimal number is moved six places to the left, the resulting number is 9 times the reciprocal of the original number. What is the original number? ________.

选项

答案3000

解析设这个数是x，将x的小数点向左移动6位，则x除以10⁶，得到的数字是x的倒数的9倍，即x/10⁶=9/x，得到x=3000。

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When the decimal point of a certain positive decimal number is moved six places to the left, the resulting number is 9 times the

GRE QUANTITATIVE

GRE

Manystudentsfindtheexperienceofattendinguniversitylecturestobeaconfusingandfrustratingexperience.Thelecturersp

AsTheplanecircledovertheairport,everyonesensedthatsomethingwaswrong.Theplanewasmovingunsteadilythroughtheair

Passer-by:______Localresident:Sure.It’sonElmStreet,betweenEleventhandTwelfthAvenue.

Whatdowemeanbyasatisfactorystandardofliving?Obviously,itmustincludethebasicnecessitiesoflifesuchasfood,clo

NeitherhisfellowworkersnorTodhimself______tothesolutionputforwardbytheemployer.

在一个有n个数的序列中，数15比序列的median少了1.5个deviation，数22比median多了2个deviation，求这个序列的median。

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