The Least Common Multiple (LCM) of 16 and 32 is 32. The other common multiples of 16 and 32 are all multiples of 32, i.e. 32, 64, 96, 128, 160, 192, 224, etc.
144
The firt three multiples of 8 are 8, 16 and 24.
Multiples of 2 are 2, 4, 6, 8, 10, 12, 14, 16, 18, . . . Multiples of 8 are 8, 16, 24, 32, 40, 48, 56, 64, 72, . . .
The first five multiples of 4 are 4, 8, 12, 16 and 20. For them to be common, they need to be compared to another set of multiples.
16, 32, 48
They are: 144, 288 and 432
8, 16, 24
144, 288, 432
144, 288, 432
48, 96, 144
8 16 24
400, 800, 1200
48, 96 and 144
80, 160, 240
32, 64, 96
For 16 and 20, 80,160,240 For 30 and 33, 330,660,990