2020年美國(guó)“大聯(lián)盟”(Math League)思維探索活動(dòng)第一階段四年級(jí)試卷

第2第2頁(yè)，共4頁(yè)8.100X(11+12)=(100X100)-(100X_9)9.Raunaksavesthreequartersinthefii就month,fourquai'tci'sinthesecondmonth,fivequartasinthetliiidmonths,andsoon.Howmuchmoney,indollar^willhesaveupin6months?A)$7.50B)$8.25C)$8.50D)$8.7510.Thesmallestnumberonmylistofconsecutivewholenumbersis99lessthanthebiggestnumber.Howmanynumbersareonmylist?11.Howmanymu11iplcsof2aredivisorsof222?12.ThesidcHcngthsofatriangleareevennumbers.Itspcrinctcrisnot13.My6-digithousenumberhastwiceasmanyevendigitsasodddigitsThesumofthedigitsofmyhousenumberisatmostA)24B)49050D)5114.Lisahasacontainei'offmit1hatcontainsonlybananas,applesandpeaches.Thecontainerhas9bananas,3redapplesand5greenapples.Ifthetotalnumberofpiecesoffiuitisfourtimesthenumberofapplesinthecontainei;howmanypeachesareinthecontained?15.Ieat2slicesofpizzaevery6minutes.Mysistereats1sliceeveiy12minules.Ifwestartealingalthesametime,howlongwillittakeustofinisha10-slicepizza?A)21minutesB)24minutesC)36minutesD)42minutes16.Ifadding64tomyfavoritenumbertiiplesit,whatmustIsubtractftninmyfavoritenumbertohalvei1?17.Theproductof3differentoddprimes,eachlessthan10,is2019-2020年度美國(guó)“大聯(lián)盟2019-2020年度美國(guó)“大聯(lián)盟”（MathLeague）思維探索活動(dòng)第一階段（四年級(jí)）（活動(dòng)日期：2019年11月24日，答題時(shí)間：75分鐘，總分：175分）學(xué)生誠(chéng)信協(xié)議：答題期間，我確定沒(méi)有就所涉及的問(wèn)題或結(jié)論，與任何人、用任何方式交流或討論.我確定我所墳寫的答案均為我個(gè)人獨(dú)立完成的成果，否則愿接受本次成績(jī)無(wú)效的處罰.考前注意事項(xiàng)：1.本試卷是四年級(jí)試卷，請(qǐng)確保和你的參賽年級(jí)一致：2.本試卷共4頁(yè)（正反面都有試題請(qǐng)檢查是否有空白頁(yè)，頁(yè)數(shù)是否齊全；3.請(qǐng)確保你己經(jīng)拿到以下材料：本試卷（共4頁(yè)，正反面都有試題）、答題卡、答題卡使用說(shuō)明、英文詞匯手冊(cè)、草稿紙。試卷、答題卡、答題卡使用說(shuō)明、草稿紙均不能帶走，請(qǐng)留在原地。4.本試卷題目很多也很難，期待一名學(xué)生所有題目全部答對(duì)是不現(xiàn)實(shí)的，能夠答對(duì)一半題目的學(xué)生就應(yīng)該受到表?yè)P(yáng)和鼓勵(lì)。選擇題：每小題5分，答對(duì)加5分，答錯(cuò)不扣分，共175分，答案請(qǐng)?zhí)钔吭诖痤}卡上。1.2019+2020=20+19+?A)2000B)20202.Thereai'e5timesasmanypigsinmybigpenasinmysmallpenHowmanypigscouldbeinbothpensalltogether?3.Eighttimesthenumberofsidesofatriangleis2timesthenumberofsidesofarectangle.1.2X0+0X0+2X0+1X1=2020-25.Howmanymultiplesof2areprime?6.Howmanytwo-digitoddnumbersare1morethanamultipleof5?7.Iftodayismybiithday,thesumofmyageinyeaisandmyageinmonthsmustbedivisibleby第1頁(yè)，共4頁(yè)18.18.A4-digitwholenumberisthesumofalmost?3-digilwholenumbers.19.Fiyetaughtherselftojuggle.Shestalled.jugglingonaFriday,with3eggs.EachdayshelearnedtojuggletwiceasmanyeggsasshehadjuggledthedaybeforeHowmanyeggswasFryejugglingbytheendofthefbllowingWednesday?096D)18920.Every8daysIswim.Every6daysIskataIfIswamandskaledonDecember1,onwhatdaydidIbothswimandskateinthefollowingmonth?A)January1B)Januaiy17C)Januaiy18D)Januaiy1921.Thegreatesteven(actorof2X3X5X7X8is22.When1dividemyscartnumberby51getaremainderof3.Whatisthesumofallpossibledifferentonesdigitsofmysecretnumber?23.MyiPodplayed10differentsongsinrandomorder;thenplayedthesame10songsinrandomorderagain.AlmosthowmanysongsdidIlistentoinordertoheaianyoneofmy3favoritesofthe10playedtwice?24.Forhowmanyone-digitwholenumbersgi-eaterthan0istheproductofthewholenumberandallitsfactorsatwo-digitnumber?A)0B)20325.Ifilledatubwithwateriiumahoseataconstantrateof36TheLubstartedemptyandleakedataconstantrateof12Mioui:Duringwhichhouroffillingwasthetubfirstfilledwith400lofwater?A)10thB)11th26.If2wholenumbersdiffei'by15,thesumoftheironesdigitsisatmost第3頁(yè)，共4頁(yè)27.27.Ofmypups,exactly4wereborninthefirst8monthsoftheyearandexactly5wereborninthelast8monthsoftheyearIfexactly3pupswerebominthe4middlemonthsoftheyea;howmanypupsdoIhave?28.Oneorangeandoneapplecost$1.05iTwoorangesandthreeapplescost$2.75Anitawantstobuytwoapples.Howmuchwillitcost?A)$0.65B)$1.300$1.70D)$2.1029.IfMayhas5Mondays,thefirstdayofMaycouldnotbeaA)SundayB)MondayC)TuesdayD)Saturday30.Iraneachofthefiisttwokmofa3-kmracetwiceasfastasIranthethiidkm.IfIrantheentireracein36minuteshowlongdidittakemetorunthethirdkm?A)12minutesB)18minutesC)24minutesD)27minutes31.Eachday,includingweekenddays,IplayvideogamesforhalfasmuchtimeasIspenddoinghomeworkthatday.Iflspentatotalof3hoursand2minutesplayingvideogameslastweek,howmuchlimeonaveragedidIspenddoinghomeworkeachdaylastweek?A)16minutesB)26minutesC)36minutesD)52minutes32.Whichquotienthasthegi'eatestremaindei?A)104-9B)1004-99C)1000