Answer:
1. 8,12,16,20,24, etc , 2 . 18,27,36,45, etc, 3. 40,60,80,100,120,140 etc
Explanation:
1. 1, 2, 4
2. 1, 3, 9
3. 1, 2, 4, 5, 10, 20
7.8m questions
10.5m answers