20, 40, 60, 80, 100, 120 * * * * * These are the first six multiples!
Multiples are the "times tables" of a number. So the first four multiples of 40 are: 40, 80, 120, 160...
40, 80, 120 +40 . . .
The multiples of 16 are 16, 32, 48, 64, 80, etc. The multiples of 20 are 20, 40, 60, 80, 100, etc. The common multiples of 16 and 20 are 80, 160, 240 and so on.
The multiples of 4 are 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, and so on. The multiples of 10 are 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, and so on.
Not all multiples of 40 are multiples of 80. Only the even multiples of 40 are also multiples of 80. The odd multiples, e.g. 40, 120, 200, 280, and 360, are not multiples of 80.
Multiples of 40 include 40, 80, 120 and so on. For them to be common, they need to be compared to another set of multiples.
The first four multiples of 20 are: 20 40 60 80
The first six multiples of 40 are 40, 80, 120, 160, 200, and 240.
20, 40, 60, 80, 100, 120 * * * * * These are the first six multiples!
The multiples of 24 are 24, 48, 72 and so on. The multiples of 40 are 40, 80, 120 and so on. The common multiples of 24 and 40 are 120, 240, 360 and so on.
The factors of 80 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80 Those which are multiples of 4 are: 4, 8, 16, 20, 40, 80
40, 80, 120, 160, 200.
Multiples are the "times tables" of a number. So the first four multiples of 40 are: 40, 80, 120, 160...
That's an infinite list that includes all the multiples of 80.
40, 80, 120, 160, 200
40, 80, 120 +40 . . .