8 and 9 are corpime, so their first common multiple is their product. The next common multiples are simply the multiples of that first multiple.
The first three common multiples are therefore 72, 144 and 216.
Chat with our AI personalities
Simply write out the multiples of 8:
1 * 8 = 8
2 * 8 = 16
3 * 8 = 24
4 * 8 = 32
5 * 8 = 40
6 * 8 = 48
7 * 8 = 56
8 * 8 = 64
9 * 8 = 72
Then write out the multiples of 9:
1 * 9 = 9
2 * 9 = 18
3 * 9 = 27
4 * 9 = 36
5 * 9 = 45
6 * 9 = 54
7 * 9 = 63
8 * 9 = 72
So far we have two multiples:
36 and 72.
The last multiple will be left as an exercise for the reader. After all, if we do your homework for you, you won't learn.
10, 20, 30 The common multiples of 5 and 10 are multiples of their lowest common multiple. The lcm of 5 and 10, is 10. Thus the first three common multiples are 10, 20, 30.
The first three multiples of 9 are 9, 18 and 27. For them to be common, they need to be compared to another set of factors.
If that's 89 and 24, common multiples include 2136, 4272, 8544 and so on.
The common multiples of any two or more numbers are the multiples of their lowest common multiple.lcm(3, 4, 5) = 60→ first three common multiples are:60 x 1 = 6060 x 2 = 12060 x 3 = 18060, 120, 180
To start with the 3 common multiples of 5 they are........10,15,and 25the 3 common multiples of 3 are.........15,30,and 45hope this helped=)