Everything except 1,2,4,5,10,20
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20 is not a factor of 30
Yes, because 4 times 5 equals 20. So 4 is a factor of 20.
the greatest common factor of 20 and 100 is:20
1 and 20 are a factor pair of 20 since 1 x 20= 20 2 and 10 are a factor pair of 20 since 2 x 10= 20 4 and 5 are a factor pair of 20 since 4 x 5= 20 5 and 4 are a factor pair of 20 since 5 x 4= 20 10 and 2 are a factor pair of 20 since 10 x 2= 20 20 and 1 are a factor pair of 20 since 20 x 1= 20
The highest common factor is: 20