336, 672, 1008
42
The Least Common Multiple of 21 and 30 is 210.
Their lowest common multiple is 63.
The LCM is: 21
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, ...
The lowest common multiple of 3 and 8 is 24.List the multiples of 3 and 8. The lowest multiple they have in common is the least common multiple.3: 3, 6, 9, 12, 15, 18, 21, 24, 27...8: 8, 16, 24...
336, 672, 1008
There is an infinite number of common multiples for 21 and 15. A common multiple of any two or more numbers is any number into which each of two or more numbers can be divided evenly (zero remainder).
LCM of 21 & 49 is 147, so all multiples of 147 are common multiples of 21 & 49.
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
There are none. The lowest multiple of 21 is 21.
there are infinite amount of common multiples.