Common multiples are numbers that are multiples of two or more given numbers. For example, 12 is a common multiple of 3 and 4 because it is a multiple of both 3 (3 x 4 = 12) and 4 (4 x 3 = 12).
Common multiples are important in mathematics because they can be used to solve a variety of problems, such as finding the least common multiple (LCM) of two or more numbers. The LCM is the smallest number that is a multiple of all of the given numbers. For example, the LCM of 3 and 4 is 12, because 12 is the smallest number that is a multiple of both 3 and 4.
