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there are infinite amount of common multiples.

Q: What are the Common multiples of 21 and 18?

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The common multiples of 9 and 21 are 63, 126, 189 and so on.

18

The LCM of 18 and 21 is 126 because 18x7=126 and 21x6=126So if you need help finding LCM you take the 2 numbers and write down the multiples of both of those numbers and see which number they both go into.so here is how i got 12618,36,54,72,90,108,12621,42,63,84,105,126The least common multiple of 18 , 21 = 126

it is 18. 18 is a multiple of all three numbers. multiples of 3: 3,6,9,12,15,18... multiples of 6: 6,12,18... multiples of 9: 9, 18...18

The common multiples of 6 and 9 are the infinite set of multiples of their LCM, which is 18. So the common multiples of 6 and 9 are 18, 36, 54, 72, 90, 108, 126, 144, 162, 180, and so on.18, 36, 54 and so on.18, 36, 54 and so on.

Related questions

LCM of 21 & 49 is 147, so all multiples of 147 are common multiples of 21 & 49.

18, yes.21, no.

The common multiples of 18 and 24 are 72 and 144.

The common multiples of 9 and 21 are 63, 126, 189 and so on.

Two common multiples of 21 and 15 are 105 and 315.

All multiples of 36 are multiples of 18.

The common multiples of 3 and 21 are 21, 42, 63 and so on.

The multiples of 3 are 3, 6, 9, 12, 15, 18, 21 and so on. The first six multiples of 6 are 6, 12, 18, 24, 30, 36, 42 and so on. Common multiples include all the multiples of 6.

The multiples of 3 are: 3, 6, 9, 12, 15, 18, 21, etc ...The multiples of 6 are: 6, 12, 18, 24, etc ...The multiples of 18 are: 18, 36, 54, etc ...The lowest multiple common to 3, 6, and 18 is 18, so the LCM = 18.

Multiply 21 and 11 to get a common multiple. Since 21 and 11 have no common factors, that also happens to be the least common multiple.All other common multiples are multiples of this least common multiple.

The lowest common multiple is 18. The first four common multiples are thus the first four multiples of 18 and are: 18, 36, 54 and 72.

Any pair of numbers has an infinite set of common multiples. The lowest common multiple of 9 and 21 is 63 and the others are multiples of this, e.g. 63, 126, 189, 252, 315, ...