Question: what is the largest common factor of 14 and 63?
Answer: Factors of 14: 1, 2, 7, and 14. Factors of 63: 1, 3, 7, 9, 21, and 63. The greatest factor on the two lists that they have in common is the GCF of 14 and 63. Therefore, the GCF of 14 and 63 is 7.