The greatest common factor (GCF) of 14, 21, and 7 is 7.
To find the GCF, we start by listing the factors of each number:
- Factors of 14: 1, 2, 7, 14
- Factors of 21: 1, 3, 7, 21
- Factors of 7: 1, 7
Now, we identify the common factors among these lists. The common factors of 14, 21, and 7 are 1 and 7. The greatest of these common factors is 7. Therefore, the GCF of 14, 21, and 7 is 7.