I am a common factor of 30 and 42. I am a multiple of 2 and 6. I am greater than 5. What number am I?
Factors of 30: 1, 2, 3, 5, 6, 10, 15, 30
Factors of 42: 1, 2, 3, 6, 7, 14, 21, 42
Highest common factor of 30 and 42: 6
Multiples of 2: 2, 4, 6
Multiples of 6: 6
Lowest common multiple of 2 and 6: 6
The number is 6.
Answer(s): 6