You need at least two numbers to find a GCF. The GCF of 21 and 42 is 21.
The GCF is 7.
The GCF of 9 and 21 is 3.
The GCF is 3.
The GCF is 9.
21 and 42 have a GCF of 21. 40 and 80 have a GCF of 40. The GCF of 21 and 40 is 1.
21 and 42.
The greatest common factor of the numbers 63, 105 and 294 is 21.
You need at least two numbers to find a GCF.For example:The GCF of 21 and 9 = 3The GCF of 21 and 28 = 7
You need at least two numbers to find a GCF. If that's 21 and 25, the GCF is 1.
GCF(28, 21) = 7 Steps: Prime factorization of the numbers: 28 = 2 × 2 × 7 21 = 3 × 7 GCF(28, 21) = 7
The greatest common factor of the numbers 56 and 21 is 7.
The GCF of that set is 1.