Question: what is the least common multiple (lcm) of 3 and 6?
Answer: In arithmetic the least common multiple (LCM) of two numbers a and b is the smallest positive integer that is a multiple of both a and b. So, the multiples of 3 are : 3, 6, 9, 12, ... The multiples of 6 are : 6, 12, ... So 12 is the first , that is least, common multiple between 3 and 6.