1,3,5,15
-- List all the factors of 15. -- List all the factors of 30. -- Spot the group of numbers that are on both lists. -- The biggest one of those is the GCF. It should be close to 15.
There are 15 factors in all.
You need to Writ edown all the factors.. :)
1 and 7
1,3,5,15
1, 3, 5, 15.
3 and 5
No.
1, 3, 5, 9, 15, 45
2, 3, 5, 6, 10, 15
-- List all the factors of 15. -- List all the factors of 30. -- Spot the group of numbers that are on both lists. -- The biggest one of those is the GCF. It should be close to 15.
1, 3, 5, 7, 15, 21, 35, 105
1, 2, 3, 5, 6, 10, 15, 30
1, 3, 5, 9, 15, 45.
All non-zero numbers have factors. These can be written down in a list. That would be known as a list of factors.
All Factors of 150:1, 2, 3, 5, 6, 10, 15, 25, 30, 50, 75, 150