18000
9000,2
4500,2,2
2250,2,2,2
1125,2,2,2
375,3,2,2,2,2
125,3,3,2,2,2,2
25,5,3,3,2,2,2,2
5,5,5,3,3,2,2,2,2
by using a prime factor tree
21
10 2 x 5
220 110,2 55,2,2 11,5,2,2
Use a factor tree. 1023 341,3 31,11,3
Use a factor tree. 78 39,2 13,3,2
The factor tree would be hard to show so here is the prime factorization.41 times 5
Use a factor tree. 36 18,2 9,2,2 3,3,2,2
A factor tree will show you the prime factorization of 88. Comparing that prime factorization of 88 and another number will you show you the GCF between the two. You need at least two numbers to find a GCF.
80 40,2 20.2,2 10,2,2,2 5,2,2,2,2
68 34,2 17,2,2 2 x 2 x 17 = 68
78 39,2 13,3,2 2 x 3 x 13 = 78