The first 5 multiples of 21 are: 21, 42, 63, 84, and 105.
The common multiples of 3 and 21 are 21, 42, 63 and so on.
21, 42, 63 and so on.
The first five multiples of 21 are: 21, 42, 63, 84, 105.
The first 5 multiples of 21 are: 21, 42, 63, 84, and 105.
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, ...
Multiples of 3 are 3, 6, 9 and so on. Multiples of 7 are 7, 14, 21 and so on. The common multiples of 3 and 7 include 21, 42, 63 and so on.
The common multiples of 9 and 21 are 63, 126, 189 and so on.
Factors: 1, 3, 7, 21 Multiples: 21, 42, 63, 84 and so on.
21, 42, 63, 84.
21, 42, 63, 84.
21, 42, 63. 84