-- 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.
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The GCF is 15.
The GCF for 15 30 45 is 15.The GCF is 15.It is: 15
The GCF is 15.
The greatest common factor (GCF) of 15, 30, 90 is 15.
The GCF is 15.
They are: gcf = 15 and LCM = 30
The greatest common factor of 15 and 30 is 15.15 x 1 = 1515 x 2 = 30
The GCF is 5.
The GCF is 1.
The GCF is 5.
The GCF is 15.
The GCF is 15.