2016 Junior Kangaroo-教师用卷

2016JuniorKangaroo-教师用卷教师用卷1、【来源】(2016JuniorKangarooQuestion#1)Atwhichofthesetimesistheanglebetweentheminutehandandthehourhandofaclockequalto150°?（）A.9pmB.8pmC.6pmD.5pmE.4pm【答案】D;【解析】Atallthetimesgiven,theminutehandispointingto12.Whentheminutehandispointingto12andtheanglebetweenthehandsis150°,thehourhandhasturned150360=512ofacompleteturn.Thereforethehourhandwillpointat5andthetimewillbe5pm.(Thereareothertimeswhentheanglebetweenthehandsis150°but,ofthese,onlyat7pmdoestheminutehandpointto12and7pmisnotoneofthetimesgiven.)2、【来源】(2016JuniorKangarooQuestion#2)Twelvepeople,andnomore,cansitevenlyspacedaroundalargesquaretable.Rohanarrangeseightofthesesquaretablesinarowtomakeonelongrectangulartable.Whatisthemaximumnumberofpeoplethatcansitevenlyspacedaroundthislongtable?（）A.48B.54C.60D.80E.96【答案】B;【解析】Thenumberofpeoplewhocansitoneachsideofthesquaretableis12÷4=3.Wheneight