# The LCM of 4 and 16 plus the GCF of 5 and 9

Learn how to find the LCM ( least common multiple of 4 and 16.

I use a

**factor tree**to find the LCM and the GCF of 4 and 16 along with the numbers 5 and 9.The least common multiple is the smallest number that is divisible by a set of numbers.
A factor tree allows you to find the prime numbers.
Once you have the prime numbers you multiply the prime numbers together for the least common multiple.

The greatest common factor is the smallest number that will divide evenly into a set of numbers.

The

**LCM**of 4 and 16 = 16 The**GCF**of 4 and 16 = 4The

**LCM**of 5 and 9 = 45 The**GCF**of 5 and 9 = 1
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