task 2, missing number) supply the the missing number one on the space provided in each item

1. 3,6,9,___
2. 4,8,12,16__
3. (4+__)+8=17
4. 6+12=12+__
5. 1,3,5,7__
6 8+4=36-___
7. 22,33,___,55
8. 36,31,26,__
9. 42,__,32,27
10. 51,59,__75

pahingi po aq sagot dito huhuh
thanks​