KSF2015-selectedproblemsEcolier
3pointproblems
1.
(A)6(B)7(C)8(D)10(E)15
2.Erichad10equalmetalstrips.
Hehasscrewedpairsofthemtogetherintofivelongstrips.
Whichstripisthelongest?
(A)A(B)B(C)C(D)D(E)E
3.Whichnumberishiddenbehindthesquare?
(A)2(B)3(C)4(D)5(E)6
1
KSF2015-selectedproblemsEcolier
4.Westartdrawingalineateveryseconddotonthecircleuntilwearebackatthenumber1.
Thefirsttwolinesaredrawnalready.Whatfiguredoweget?
(A)(B)(C)
(D)(E)
5.Lucyhadsomekangasinherwallet(seethepicture).Shewenttoashopwhereshebought
aballandpaid7kangas.
Howmanykangasdidshehavewhenshelefttheshop?
2
KSF2015-selectedproblemsEcolier
(A)(B)
(C)(D)
(E)
6.Awholenumberhastwodigits.Theproductofthedigitsofthisnumberis15.Thesumof
thedigitsofthisnumberis:
(A)2(B)4(C)6(D)7(E)8
7.Inthefigure,weseeanislandwithahighlyindentedcoastlineandseveralfrogs.How
manyofthesefrogsaresittingontheisland?
(A)5(B)6(C)7(D)8(E)9