Solution:
- Tap on the briefcase below the level number
- Group the numbers in 4 sets. Each sum of the numbers in the group must end in "0"
- 2, 3, 5 = 10
- 13, 17 = 30
- 9, 21 = 30
- 18, 12 = 30
100 Doors : Aliens Space [Level 80] Answer, Cheats, Solution for Android, iPhone, iPad, iPod.
Note: This is "100 Doors : Aliens Space" by Gipnetix LTD