lowest common multiple of 3 and 7
Understand the Problem
The question is asking for the lowest common multiple (LCM) of the numbers 3 and 7. This is a mathematical concept that involves finding the smallest number that is a multiple of both 3 and 7.
Answer
21
Answer for screen readers
The lowest common multiple of 3 and 7 is 21.
Steps to Solve
- List the multiples of each number
List the first few multiples of 3 and 7.
- Multiples of 3: 3, 6, 9, 12, 15, 18, 21, 24...
- Multiples of 7: 7, 14, 21, 28, 35...
- Identify the common multiples
Find the multiples that appear in both lists.
- Select the smallest common multiple
Out of the common multiples identified, the smallest one is chosen.
The first common multiple of 3 and 7 is 21.
The lowest common multiple of 3 and 7 is 21.
More Information
The LCM of two prime numbers is simply their product because they do not share any common factors other than 1.
Tips
A common mistake is to stop listing multiples too early and miss the LCM. Be sure to list enough multiples so you can find the common one.
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