3, 6, 9, 12, 15, 18, 21, 24, 27, 30
The factor numbers are 3 and -17.
The two numbers that have the greatest common factor of ten are any two multiples of ten. This is because the greatest common factor is the largest number that divides evenly into both numbers. So, for example, 10 and 20 have a greatest common factor of 10 because 10 is the largest number that divides evenly into both 10 and 20.
Any number that is a multiple of 3 has 3 as a factor.
There are an infinite number of numbers with 3 as a factor. Any number evenly divisible by 3 has 3 as a factor. That means 6, 9, 12, 15, 18, ..., all have 3 as a factor.
Multiples of 3.
6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84,87,90,93,96,99,102,105,108,111,114,117,120,123....
No.
All numbers have factors. Some numbers have some of the same factors as other numbers. These are known as common factors. 3 is a factor of 9. 3 is a factor of 15. 3 is a common factor of 9 and 15.
All numbers have factors. Some numbers have some of the same factors as other numbers. These are common factors. If the factor is a prime number, it is a common prime factor. 3 is a prime number. 3 is a factor of 9. 3 is a factor of 12. 3 is a common prime factor of 9 and 12.
10 and 20, among others.
Every number that ends in 0 except 0 itself.
30 has three prime numbers and is a factor of 60.