There cannot be a common factor of just one number. To be common there need to be at least two numbers.
Common factors of 10 and 63 are: 1.
The factors of 10 are 1, 2, 5, and 10. The factors of 5 are 1 and 5. The common factors of 10 and 5 are 1 and 5.
The factors of 10 are 1, 2, 5 and 10. For them to be common, they need to be compared to another set of factors.
The common factors of 6 and 10 are 1 and 2.
The common factors are: 1, 2, 5, 10
They can be. 4 and 10 are common factors of 20 and 40.
Common factors of 10 and 16 are: 1 and 2.
The common factors are: 1, 2, 5, 10.
The common factors are: 1, 2, 5, 10.
The common factors of 10 and 30 are: 1, 2, 5, and 10
The common factors of 10 and 180 are: 1, 2, 5, and 10
The common factors of 10 and 100 are 1, 2, 5, 10