0
Use a factor tree to break up your numbers until all the roots of your number are prime. 7 is already prime and 4 is 2 and 2. Now you scratch off any roots these numbers share, but since 7 and 4 share none you move to the next step. Multiply the remaining roots together (7, 2, and 2) to get your first common multiple. To the get the second and third common multiples simply multiply the first multiple by 2 and then go back and multiply it by 3. This way of solving works for all common multiple problems, including ones with more than 2 numbers.
The answers you should get are 28, 56, and 84.
28, 56, 84
Wiki User
∙ 8y ago
Wiki User
∙ 9y ago84, 168, 252 and so on.
Add your answer:
Earn +20 pts
What are the First 3 common multiples of 3 and 4?
A common multiple of 3 and 4 is a number which is a multiple of 3 and of 4. The first 3 common multiples of 3 and 4 are 12, 24, 36
What are the first 3 common multiples of 4?
The first three multiples of 4 are 4, 8 and 12. For them to be common, they need to be compared to another set of multiples.
What are the first three common multiples of 2 and 4?
4, 8 and 12 are the first 3 common multiples of 2 and 4
What are the 3 first common multiples of 4 and 9?
They are the first three multiples of their lowest common multiple: 36, 72, 108.
What are the three common multiples of 4 and 12?
The first 3 common multiples of 4 and 12 are: 12, 24, 36
What are the first ten common multiples of 2 and 3?
Get the first common multiple, then multiply that by 0, 1, 2, 3, 4, etc. to get additional common multiples.
What are the first 3 common multiples of 8 and 4?
8,16,24
First 3 common multiples of 4 and 6?
76
What is the first 3 common multiples of 2 and 4?
They are 4, 8 and 12
What are the first common multiples of 3 4 5 7?
The first common multiple of 3 4 5 and 7 is 420.
What are the first 3 common multiples of 2?
2 4 6
What are the first common multiples of 3 4 6?
12,24,36
