there are infinite amount of common multiples.
The common multiples of 9 and 21 are 63, 126, 189 and so on.
no they are nor multiples of 6
The lowest common multiple of 21 and 34 is 714. Therefore, the common multiples of 21 and 34 are the multiples of 714. The first five are: 1 x 714 = 714 2 x 714 = 1428 3 x 714 = 2142 4 x 714 = 2856 5 x 714 = 3570
The first 5 multiples of 21 are: 21, 42, 63, 84, and 105.
336, 672, 1008
They are: 21, 42 and 63
21, 42 and 63
If that's 9, 14 and 21, the first three common multiples are 126, 252 and 378.
LCM of 21 & 49 is 147, so all multiples of 147 are common multiples of 21 & 49.
105 and 210
21
there are infinite amount of common multiples.
7, 14, 21
63, 126, 189
42, 84, 126
63, 126, 189