336, 672, 1008
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
21, 42 and 63
They are: 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.
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.
Since the only factor those two numbers have in common is 1, the LCM will be their product. Any other common multiples will be multiples of their product.
7, 14, 21