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Q: What are all the multiples of 9 and 21?

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

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

All multiples of 72 are greater than 21. If you're looking for factors of 72, use 9 and 12 or 18 and 3

Common multiples of 9 and 10 are all of the multiples of 90.

The multiples of 9, 14 and 21 are infinite, starting with: 126, 252, 378, 504, 630, 756, 882 +126 . . .

No; all multiples are not multiples of 6, for example 3×3 = 9 is not a multiple of 6. However as 6 = 2×3 all multiples of 6 are also multiples of 3.

There are infinitely many multiples of 21 and it is impossible to list them all other than as 21*n where n is an integer.

There are infinitely many of them so I will not bother trying to list them.

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, ...

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

Yes, all multiples of 9 are also multiples of 3.but they're not all of them. Every multiple of 9 is also a multiple of 3, but there are more multiples of 3 besides those.

9

multiples of 63

315

3, 6, 9, 12, 15, 18, and 21 are.

3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, . . .

All multiples of 18 are divisible by 9. Not all multiples of 9 are divisible by 18.

Multiples of 5,6 and 9 are 90, 180, 270, 360, 450 and so on. Multiples of 90 will all be multiples of 5, 6 and 9.

6363

63, 126, 189 and so on.

63, 126, 189 and so on.

63 and its multiples

126

Just 63

The LCM is 63.

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