math 5th grade
posted by tryston .
my number is a factor of 20. It's a;sp a factor of 30 what is my number or numbers

make a factoer tree
what is 20 made up of
1x20
2x10
4x5
what is 30 made up of
1x30
2x15
3x10
5x6
now what number(s) is/are the same that is your anwser 
2 is a factor of both 20 and 30..can you think of anymore? I think there are two more.

20
20
20
30
30
30
30 
30 = 2 * 3 * 5
20 = 2 * 2 * 5
2 * 5 = 10 
2 a factor of 15 number sentence