What is the LCM of 5 and 20?
Understand the Problem
The question is asking for the least common multiple (LCM) of the numbers 5 and 20. To solve it, we need to determine the smallest number that is a multiple of both 5 and 20.
Answer
The LCM of 5 and 20 is \( 20 \).
Answer for screen readers
The least common multiple (LCM) of 5 and 20 is ( 20 ).
Steps to Solve
- List the multiples of each number
First, generate the multiples of the numbers 5 and 20.
For 5:
- 5, 10, 15, 20, 25, 30, 35, ...
For 20:
- 20, 40, 60, 80, ...
- Identify the common multiples
Next, find the multiples that appear in both lists.
From our lists, we can see that the common multiples are:
- 20, 40, 60, ...
- Select the least common multiple (LCM)
Now, choose the smallest number from the common multiples identified.
The LCM of 5 and 20 is:
- 20
The least common multiple (LCM) of 5 and 20 is ( 20 ).
More Information
The least common multiple of two numbers is the smallest multiple that both numbers share. In this case, since 20 is a multiple of 5, it is the least common multiple.
Tips
- Forgetting to list enough multiples: Ensure to list multiples until you find a common one.
- Not recognizing a number is a multiple: Remember that every number is a multiple of itself, so if one number divides another perfectly, the larger number is the LCM.
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