I am a common factor of 36 and 60. I am a multiple of 3 and 12. I am greater than 7. What number am I?
Factors of 36: 1, 2, 3, 4, 6, 9, 12, 18, 36
Factors of 60: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
Highest common factor of 36 and 60: 12
Multiples of 3: 3, 6, 9, 12
Multiples of 12: 12
Lowest common multiple of 3 and 12: 12
The number is 12.
Answer(s): 12