The least common multiple (LCM) of two numbers is the smallest multiple that is evenly divisible by both.
To find the LCM of 4 and 5:
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List the multiples of each number:
- Multiples of 4: 4, 8, 12, 16, 20, 24, ...
- Multiples of 5: 5, 10, 15, 20, 25, ...
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Identify the smallest common multiple:
- The smallest multiple that appears in both lists is 20.
Thus, the LCM of 4 and 5 is 20.