Finding the Least Common Multiple of 4 and 5

To find the least common multiple (LCM) of 4 and 5, you can use the prime factorization method. Start by breaking down each number into its prime factors:

4 = 2 * 2 5 = 5

Then, identify the highest power of each prime factor in the prime factorization of the numbers. In this case, the LCM of 4 and 5 is calculated as:

LCM(4, 5) = 2^2 * 5 = 20

So, the least common multiple of 4 and 5 is 20.

This method can be applied to find the LCM of any numbers, making it a valuable tool in number theory.