Find the sum of all the common multiples of 3 and 4 that are less than 41.
Multiples of 3: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39
Multiples of 4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40
Common multiples of 3 and 4: 12, 24, 36
Sum of all the common multiples of 3 and 4 that are less than 41
= 12 + 24 + 36
= 72
Answer(s): 72