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.
It is: 80 and 100
64, 80, 96.
They are 20, 40, 60, 80, 100.
The first 10 multiples are: of 4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40 of 8: 8, 16, 24, 32, 40, 48, 56, 64, 72, 80 of 16: 16, 32, 48, 64, 80, 96, 112, 128, 144, 160 lcm(4, 8, 16) = 16, so the multiples of 16 are also their common multiples.
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
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.
25,20,5,30
It is: 80 and 100
80, 84, 88, 92, 96, 100
Multiples of 80 are 10 and 8
The first 5 multiples of 4 and 20 are 20, 40, 60, 80, 100
64 80 96
No number has the multiples of 1, 2, 4, 5, 8, 10, 16, 20, 40, 80, but the number 80 (and all its multiples: 160, 240, 320, 400, ...) has them all as FACTORS.
80 and 100
First multiples of 80 are 1 and 80
40, 80, 120