1 and 7
The common multiples of 9 and 21 are 63, 126, 189 and so on.
no they are nor multiples of 6
The first 5 multiples of 21 are: 21, 42, 63, 84, and 105.
there are infinite amount of common multiples.
LCM of 21 & 49 is 147, so all multiples of 147 are common multiples of 21 & 49.
21, 42, 63, 84
There are infinitely many multiples of 9 and 21 so it is impossible to list them. One of their multiples is 9*21 = 189.
21: 21, 42, 63, and 84!
Multiples 21: 1,3,7,21Multiples 49: 1,7,49
There are 71 multiples altogether here. Some of them are 7, 14, 21.
The common multiples of 3 and 21 are 21, 42, 63 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
1 and 7
1,21,3,7, those are all check if you want :)
three
Because all of those numbers are divisible by 21.