Prime factor trees
What are the prime factors of 40
40
4 10
2 2 2 5
What is the GCF of 40 and 60?
40 60
4 10 6 10
2 2 2 5 2 3 2 5
2x2x5= 20
What are all the common factors of 12 and 16
12:1,2,3,4,6,12
16:1,2,4,8,16
common factors: 1,2,4
67 X 85=
odd x odd =odd
30,31,32,33,35,36,40,41,
36
What are the prime factors of 60
60
6 10
3 2 2 5
What is the GCF of 18 and 27?
18:1,2,3,6,9,18
27: 1,3,9,27
GCF: 9
What are all the common factors of 24 and 28
24:1,2,3,4,6,8,12,24
28:1,2,4,7,14,28
Common Factors: 1,2,4
544 x 73=
even x odd = even
48,49,50,51,59,60,64,65,66,67,
49,64
What are the prime factors of 33 and 55
33 55
3 11 5 11
What is the GCF of 30 and 40?
30:1,2,3,5,6,10,15,30
40:1,2,4,5,8,10,20,40
GCF: 10
What are all the common factors of 15,20,30
15:1,3,5,15
20:1,2,4,5,10,20
30:1,2,3,5,6,10,15,30
common factors: 1,2,5,
821 + 34 =
odd + even = odd
79,80,81,90,92,94,95,97,99,100
81, 100
What are the prime factors of 24 and 40
24 40
4 6 4 10
2 2 2 3 2 2 2 5
What is the GCF for 24 and 32?
24:1,2,3,4,6,8,12,24
32:1,2,4,8,16,32
GCF:8
1,234 X 236=
even x even = even
110,111,120,121,130,131,140,141,144,
121,144