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# What are the Common multiples of 21 and 18?

Updated: 4/28/2022

Wiki User

13y ago

there are infinite amount of common multiples.

Wiki User

13y ago

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Q: What are the Common multiples of 21 and 18?
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### Common multiples of 21 and 49?

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

18, yes.21, no.

### What are the common multiples of 18 and 24?

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

### What are common multiples of 9 21?

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

### What are the two common multiples of 21 and 15?

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

### What are two common multiples for 18 and 36?

All multiples of 36 are multiples of 18.

### What are the multiples of 3and 21?

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

### What are the multiples of 3 and 6?

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.

### What is the LCM of 3 and 6 and 18?

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.

### What are the common multiples of 21 and 11?

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.

### What are the first four common multiples of 6and 9?

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.

### What are the common multiples of 21 and 9?

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, ...