Question: what is the least common multiple of 6?
Answer: Multiples of 6 are: 6, 12, 18, 24, 30, 36, ... Multiples of 8 are: 8, 16, 24, 32, 40, .... So 24 is the least common multiple (I can't find a smaller one!) Hint: We can have smaller lists for the bigger numbers.