v1.0可编辑可修改11英文奥数1．maths(English)1）FindthesumofalltheprimenumbersBetween20and30.2）Dividethesumofthefirstfiveoddnumbersbythesumofthefirsttwoprimenumbers.3）Subtract2fromthesumofthefirstfiveevennumbers.Thedifferenceisthendividedbythefirstoddnumberfollowing5.Whatisthequotient4）Findthevalueof[4+8]÷[5×4-6]andgivetheanswercorrectto2decimalplaces1）Alltheprimenumbersbetween20and30are23and29，ThesumofalltheprimenumbersBetween20and30=23+29=522）Thefirstfiveoddnumbersare1,3,5,7and9Thesumofthefirstfiveoddnumbers=1+3+5+7+9=253）Thefirsttwoprimenumbersare2and3Thesumofthefirsttwoprimenumbers=2+3=54）Thefirstfiveevennumbersare2,4,6,8and10Thesumofthefirstfiveevennumbers=2+4+6+8+10=305）Thedifferencebetweenthesumofthefirstfiveevennumbersand2=30-2=286）Thefirstoddnumberfollowing5is7Thequotient=28/7=47）Thevalueof[4+8]÷[5×4-6]=12÷(20-6)=12÷14=(Corr.to2decimalplaces)2．Sixtreesareequallyspacedalongonesideofastraightroad.thedistancefromthefirsttreetothefourthis60feet.whatisthedistanceinfeetbetween.Thefirstandlasttreesv1.0可编辑可修改223．Attheendof2005walterwashalfasoldashassnmoftheyearsinwhichtheywerebornis3860.howoldwillwalterbeattheendof20064．Thedigits1,2,3,4and9areeachusedoncetoformthegreatestpossibleevenfive-digitnumber.Whatisthedigitinthetensplace*************************************************1、In2004,16JunefallsonaWednesday.Onwhatdayoftheweekwill16Junefallin20102、Inamagicsquarethesumofthenumbersineachrow,ineachdiagonalandineachcolumnareequal.Inthismagicsquarethevalueofxis:3、Ifhalfofanumberis30,thenthree-quartersofthatnumberis____.4、Thesumofthedigitsofthefollowingproduct999×5555．Threepositiveintegershaveasumof28.Thegreatestpossibleproductthattheseintegerscanhaveis_____.6、Jackwastryingtotessellateregularpentagons.Hemanagedthefollowingfigure.Thesizeofangle.a.is______.7、Iftheareaoftheshadedregionoftheregularhexagoninthediagrambelowis36cm2,theareaofthewholehexagonincm2is_____.8、Inwhatfollows,□andΔaredifferentnumbers.v1.0可编辑可修改33When503isdividedby□theremainderis20.When503isdividedbyΔtheremainderis20.When493isdividedby□xΔtheremainderis_____.9、Alady,herbrother,hersonandherdaughter(allrelatedbybirth)playedvolleyball.Theworstplayer'stwin(whoisoneofthefourplayers)andthebestplayerareofoppositesex.Theworstplayerandthebestplayerareofthesameage.Whocannotbetheworstplayer(s)A)brotheronlyB)daughteronlyC)sonanddaughteronlyD)ladyanddaughteronlyE)ladyonly10、Ifyoucontinuethegivennumberpattern,inwhatrowandinwhatpositioninthatrowwillthenumber320be1--------------row123--------------row2456--------------row378910--------------row4Theanswersaregivenintheorderofrow;position.参考答案：1、Wednesday2、123、454、27（求数位上上的数字之和）5、28=9+9+10，因此答案为8106、36度7、1088、503-20=483483=3×7×23＝21×23，因此□xΔ＝483，因此此题余数是10.9、D10、25，20v1.0可编辑可修改44##**##***************###############·········****#####附一道考试真题：At10:30,theanglelessthan180°FormetbyhourhandandminuteHandofnormalclockis***(英汉词典：angle角；lessthan小于；tofrom形成；hourhand时针；Minutehand分针；normal正常，正规；clock钟，时钟）***上面是一道关于时钟问题的英文奥数题，猜猜是什么意思附参考答案：如果做过相关的时钟问题，借助于所给的解释可以理解到：求10：30分时，时针与分针所形成的小于180的夹角是多少答案：135°。****************有学生问：在钟面上，如果知道X时Y分，输入一个...
