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# Prime/Composite

### These cards have FOUR sides, flip thru them all!

21 21 : odd, not divisible by 2 2+1=3 : Is divisible by 3 COMPOSITE COMPOSITE
0 NEITHER prime or composite NEITHER NEITHER NEITHER
8 8 : even, divisible by 2 COMPOSITE COMPOSITE COMPOSITE
9 9 : odd, not divisible by 2 9 : divisible by 3 COMPOSITE COMPOSITE
15 15 : odd, not divisible by 2 15 : 1+5=6 , divisible by 3 15 : ends in 5, divisible by 5 COMPOSITE
17 17 : odd, not divisible by 2 17 : 1+7=8 , not divisible by 3 17 : doesn't end in 0 or 5, not divisible by 5 PRIME
39 39 : odd, not divisible by 2 39 : 3+9=15 , divisible by 3 COMPOSITE COMPOSITE
41 41 : odd, not divisible by 2 41 : 4+1=5 , not divisible by 3 41 : doesn't end in 0 or 5, not divisible by 5 PRIME
45 45 : odd, not divisible by 2 45 : 4+5=9 , divisible by 3 45 : ends in 5, divisible by 5 COMPOSITE
51 51 : odd, not divisible by 2 51 : 5+1=6 , divisible by 3 COMPOSITE COMPOSITE
57 57 : odd, not divisible by 2 57 : 5+7=12 , divisible by 3 COMPOSITE COMPOSITE
62 62 : even, divisible by 2 COMPOSITE COMPOSITE COMPOSITE
67 67 : odd, not divisible by 2 67 : 6+7=13 , not divisible by 3 67 : doesn't end in 0 or 5, not divisible by 5 PRIME
93 93 : odd, not divisible by 2 93 : 9+3=12 , divisible by 3 COMPOSITE COMPOSITE
7 7 : odd, not divisible by 2 7 : not divisible by 3 7 : not divisible by 5 PRIME
11 11 : odd, not divisible by 2 11 : 1+1= 2 : not divisible by 3 11 : not divisible by 5 PRIME
1 NEITHER prime or composite NEITHER NEITHER NEITHER
Created by: PRO Teacher lit123