It is: 6
Common factor requires more than one number.
The greatest common factor (or highest common factor) is the highest number that divides exactly into two or more numbers. 20: 1, 2, 4, 5, 10, 20 30: 1, 2, 3, 5, 6, 10, 15, 30 The highest common factor of 20 and 30 is 10.
The least common factor of 30 and 42 is the smallest number that is a factor of both of them and is 1.However, I suspect that you mean either:What is the highest common factor of 30 and 42?ie what is the highest number that is a factor of both 30 and 42: hcf = 6;What is the lowest common multiple of 30 and 42?ie that is the smallest number that is a multiple of both 30 and 42 lcm = 210.
The highest common factor is 15
Their greatest common factor is 15
The highest common factor of the numbers 210 and 330 is 30.
The greatest common factor of the numbers 14 and 30 is 2.
1 and the highest common factor is 6
The Greatest Common Factor (GCF) is: 10
The Greatest Common Factor (GCF) is: 6
It is 1 but the highest common factor is 6
The greatest common factor of 30 and 126 is 6 .