Dundeejdjdjrhrhhzrdjdjfjjfhfhrhfjdjcuufjrjrhrhurududuufucufufuru
18+30=48
48+40=88
88+40=128
128+50=178
Thats all i found so far in the pattern
30,40,40,50
then it drops
by 140 then adds by 30..
I dont know how else to explain it
Answer:
the right answer would be 13
