36, 72, and 108.
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To find the common multiples of 3, 6, and 18, we need to list out the multiples of each number and find the numbers that appear in all three lists. The multiples of 3 are 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, and so on. The multiples of 6 are 6, 12, 18, 24, 30, and so on. The multiples of 18 are 18, 36, 54, 72, and so on. The first three common multiples of 3, 6, and 18 are 18, 36, and 54.
If you mean: 2, 3 and 9 then they are 18 and 36
18, 36, 54
All nonzero numbers have multiples. Some numbers have some of the same multiples as other numbers. These are known as common multiples. 36 is a multiple of 4. 36 is a multiple of 9. 36 is a common multiple of 4 and 9.
The first 3 multiples of 4 are: 4, 8, and 12.The first 3 multiples of 9 are: 9, 18, and 27.