3.
3
2 is the only number is that both a factor of 2 and a multiple of 2.
6 is a factor of 30 and a multiple of 2.
2
Since 12 is an even number, it is a multiple of 2.
The only prime factor of 4 is 2. No prime number is a multiple of 5.
6
Only if the number is a multiple of 12.
12 is a multiple of 2.
2 is the only number is that both a factor of 2 and a multiple of 2.
1, 2, 3, 4, 8
6 is a factor of 30 and a multiple of 2.
12
2
No, it is a factor. 12 is a multiple of 6.
2 is a factor of 14 but not a multiple of 7.
The factors of 12 are: 1, 2, 3, 4, 6, 12. Those which are not multiples of 3 are: 1, 2, 4.
2 is a factor of 18 and is not a multiple of 3.