From 1-12 the multiples of 8 are: (left side)
8,16,24,32,40,48,56,64,72,80,88,96
From 1-12 the multiples of 12 are: (right side)
12,24,36,48,60,72,84,96,108,120,132,144
The common multiples are: (middle)
24, 48, 72 and 96
***I’m not sure if you’d incorporate 0. But that would also count**
