The greatest common factor of 100 and 144 is 4.
The factors of 100 are 2*2*5*5.
The factors of 144 are 2*2*2*2*3*3.
Since there are two sets of 2 in both 100 and 144, 2*2=4 and this is your greatest common factor.
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48
It is: 4
12
The Greatest Common Factor (GCF) of 144, 45, and 18 is 9.
The least common factor of any set of numbers is 1.