InternationalKangarooMathematicsContest2008
CadetLevel:Class(78)MaxTime:2Hours
3-pointproblems
1)
Howmanypiecesofstringarethereinthepicture?
A)3B)4C)5D)6
2)
Inaclassthereare9boysand13girls.Halfofthechildreninthisclasshavegotacold.How
manygirlsatleasthaveacold?
A)0B)1C)2D)3
3)
6kangarooseat6sacksofgrassin6minutes.Howmanykangarooswilleat100sacksof
grassin100minutes?
A)100B)60C)6D)600
4)
Numbers2,3,4andonemorenumberarewritteninthecellsof2×2table.Itisknown
thatthesumsofthenumbersinthefirstrowareequalto9,andthesumofthenumbers
inthesecondrowisequalto6.Theunknownnumberis
A)5B)6C)7D)8
5)
Thetriangleandthesquarehavethesameperimeter.Whatistheperimeter
ofthewholefigure(apentagon)?
4cmA)24cmB)28cmC)32cm
D)Itdependsuponthetrianglemeasures
6)
Afloristhad24white,42redand36yellowrosesleft.Atmost,howmanyidenticalbunches
canshemake,ifshewantstousealltheremainingflowers?
A)4B)6C)8D)12
7)
Acubehasallitscornerscutoff,asshown.Howmanyedgesdoestheresulting
shapehave?
A)30B)36C)40
D)Anotheranswer
8)
Threelinesintersectinonepoint.Twoanglesaregiven
inthefigure.108°
Howmanydegreesisthegreyangle?124°
A)52