To find common multiples you first need to split the numbers into their prime factors:
4=2x2
8=2x2x2
10=2x5
The next step is to cross off any duplicates. All numbers have one 2, so we can discard 2 of them. Two numbers have an additional 2, so we can discard one of them. This leaves us with 2,2,2 and 5.
Multiply these together for the lowest common multiple:
2x2x2x5=40
To find other common multiples you simply times 40 by 2,3,4 and so on.
So the first three common multiples of 4,8, and 10 are 40, 80 and 120.
What are the first three common multiples of four and five
Multiples of 2 are 2, 4, 6, 8, 10, 12, 14, 16, 18, . . . Multiples of 8 are 8, 16, 24, 32, 40, 48, 56, 64, 72, . . .
The firt three multiples of 8 are 8, 16 and 24.
24, 48, 72.
88, 176, 264
2 8 12
All the common multiples of a set of numbers are the multiples of their lowest common multiple: lcm(5, 8, 10) = 40 → first three common multiples are 40, 80, 120
40, 80, 120
40, 80 & 120
They are: 40 80 and 120
120, 240, 360
40, 80, 120
40, 80 ,120.
The first three common multiples of 8 and 12 are 24, 48, and 72.
Here are the first 10 multiples of 8, that is 8 times 1 through to 8 times 10. 8,16,24,23,40,48,56,64,72,10
40, 80, 120
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.