you have to use a factor tree
division ladder for 12,16,28 and the gcf of all them
The GCF of 10 and 15 is 5.
The GCF is 3.
The GCF is 1.
The GCF of 18 and 57 is 3.
7
9
6
The GCF of 27 and 30 is 3.
5
5 |10,15, |_________2,3The GCF of 10 and 15 is 5.
The division ladder is a method used to find the greatest common factor (GCF) of two numbers by listing the factors of each number. To find the GCF of 82, you would start by factoring the number 82. The factors of 82 are 1, 2, 41, and 82. Therefore, the GCF of 82 is 1.