Answer:
Hi there, I think the pattern here is that the numbers on the left will be increased on the right starting at the top with 1 and ending at the bottom with 6. For example, 6 is increased by 3 and 12 is increased by 6. So it might look like this -
2 -> 3 (+1)
4 -> 6 (+2)
6 -> 9 (+3)
8 -> 12 (+4)
10 -> 15 (+5)
12 -> 18 (+6)