12 and 24
30
Since 30 is a multiple of 6, all multiples of 30 are common.
The lcm of 5, 15 and 30 is 30
Just 60.
Do you mean common multiples? If so, then 30, 60, 90 etc. are common multiples of 30 and 5. If you mean multiples of 5 and factors of 30, that's 5, 15 and 30.
30
There are infinite common multiples for a set of numbers. So it is not possible to write down all the common multiples. Some common multiples of 15, 30 and 45 are 90, 180, 270, 360,... There is another way to find common multiples: Write the multiples of LCM(15, 30, 45). Actually the common multiples of a set of numbers are the multiples of their LCM. LCM of 15, 30 and 45 is 90. And the multiples of 90 are 90, 180, 270, 360, 450, 540,... which are the common multiples of 15, 30 and 45.
15, 30, and 45
The common multiples of 12 and 30 are numbers that are divisible by both 12 and 30. To find the common multiples, you can list out the multiples of each number and find the numbers that appear in both lists. The common multiples of 12 and 30 are 60, 120, 180, and so on, as these numbers can be evenly divided by both 12 and 30.
The multiples of 3 up to 30 are: 3,6,9,12,15,18,21,24,27,30.The multiples of 5 up to 30 are: 5,10,15,20,25,30.The only common multiples are 15 and 30.The LCM is: 30
The multiples of 4 up to 30 are: 4, 8, 12, 16, 20, 24, 28.
They are any multiples of 30