What is this digit operation?
0 -> 0 1 -> 9 121 -> 9 44 -> 6 15 -> 5 1243 -> 7 ...
Solution Stats
Problem Comments
Problem Recent Solvers74
Suggested Problems
-
198 Solvers
-
Determine Whether an array is empty
564 Solvers
-
Magic is simple (for beginners)
1217 Solvers
-
Simple equation: Annual salary
3429 Solvers
-
145 Solvers
More from this Author43
Problem Tags
Select a Web Site
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
Select web siteYou can also select a web site from the following list:
Americas
- América Latina (Español)
- Canada (English)
- United States (English)
Europe
- Belgium (English)
- Denmark (English)
- Deutschland (Deutsch)
- España (Español)
- Finland (English)
- France (Français)
- Ireland (English)
- Italia (Italiano)
- Luxembourg (English)
- Netherlands (English)
- Norway (English)
- Österreich (Deutsch)
- Portugal (English)
- Sweden (English)
- Switzerland
- United Kingdom (English)