试题-全国-2019_小升初数学经典奥数试题1-豆柴文库

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1考前高分冲刺：小升初经典奥数试题考前高分冲刺：小升初经典奥数试题及答案1、In2004,16JunefallsonaWednesday.Onwhatdayoftheweekwill16Junefallin2010?2、Ifhalfofanumberis30,thenthree-quartersofthatnumberis____.3、Thesumofthedigitsofthefollowingproduct999×5554、Threepositiveintegershaveasumof28.Thegreatestpossibleproductthattheseintegerscanhaveis_____.5、Inwhatfollows,□andΔaredifferentnumbers.When503isdividedby□theremainderis20.When503isdividedbyΔtheremainderis20.When493isdividedby□xΔtheremainderis_____.6、Alady,herbrother,hersonandherdaughter(allrelatedbybirth)playedvolleyball.Theworstplayer'stwin(whoisoneofthefourplayers)andthebestplayerareofoppositesex.Theworstplayerandthebestplayerareofthesameage.Whocannotbetheworstplayer(s)?A)brotheronlyB)daughteronlyC)sonanddaughteronlyD)ladyanddaughteronlyE)ladyonly7、Ifyoucontinuethegivennumberpattern,inwhatrowandinwhatpositioninthatrowwillthenumber320be?1--------------row123--------------row2456--------------row378910--------------row4Theanswersaregivenintheorderofrow;position.参考答案：1、Wednesday2、453、27(求数位上上的数字之和)4、28=9+9+10，因此答案为8105、503-20=483483=3×7×23=21×23，因此□xΔ=483，因此此题余数是10.6、D7、25，201、Didyouknow?Inthedecimalnumbersystem(base10)tendifferentdigits,0to9,areusedtowriteallthenumbers.Inthebinarynumbersystem(base2)twodifferentdigitsareused,i.e.0and1.Whichoneofthefollowingnumbersisnotavalidnumberintheoctalnumbersystem(base8)?A)128B)127C)126D)125E)1242、Thenumberofdiagonalsthatcanbedrawninaregularpolygonwithtwentysides(icosagon)is_____.3、Ifaandbareintegers,10??3=1,152??7=3,andthen379??6isequalto_____.4、Twonumbersareintheratio2:3.When4isaddedtoeachnumbertheratiochangesto5:7.Thesumofthetwooriginalnumbersis____.5、ThegreatestnumberofMondayswhichcanoccurin45consecutivedaysis____6、Saulplaysavideogameinwhichhescores4forahitandlost6foramiss.After20roundshisscoreis30.Thenumberoftimeshehasmissedis____.7、ThreegirlsA,BandCrunina100mrace.WhenAfinishes,Bis10mbehindAandwhenBfinishesCis20mbehindB.HowfarinmetreswasCfromAwhenAfinished?(Let’sassumeall