What is the fourth common multiple of 12 and 13?
Multiples of 12: 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144, 156 ...
Multiples of 13: 13, 26, 39, 52, 65, 78, 91, 104, 117, 130, 143, 156 ...
First common multiple of 12 and 13 = 156
Second common multiple of 12 and 13 = 4 x 156 = 624
Answer(s): 624