| #16801 | Managing DifficultiesNWRRC 2019 | |
| #16802 | Blind BottlesMid-Atlantic USA Regional 2025Southeast USA Regional 2025South Central USA Regional 2025Interactive | |
| #16803 | BreakoutMid-Atlantic USA Regional 2025Southeast USA Regional 2025South Central USA Regional 2025 | |
| #16804 | Galaxy GovernanceMid-Atlantic USA Regional 2025Southeast USA Regional 2025South Central USA Regional 2025 | |
| #16805 | Game of NinesMid-Atlantic USA Regional 2025Southeast USA Regional 2025South Central USA Regional 2025 | |
| #16806 | GUID GeneratorMid-Atlantic USA Regional 2025Southeast USA Regional 2025South Central USA Regional 2025 | |
| #16807 | Inazuma Cube DeviceMid-Atlantic USA Regional 2025Southeast USA Regional 2025South Central USA Regional 2025 | |
| #16808 | Manhattan InterferenceMid-Atlantic USA Regional 2025Southeast USA Regional 2025South Central USA Regional 2025 | |
| #16809 | Meeting Free FridaysMid-Atlantic USA Regional 2025Southeast USA Regional 2025South Central USA Regional 2025 | |
| #16810 | Memories of Passport ControlMid-Atlantic USA Regional 2025Southeast USA Regional 2025South Central USA Regional 2025 | |
| #16811 | Moonlit Time MachineMid-Atlantic USA Regional 2025Southeast USA Regional 2025South Central USA Regional 2025 | |
| #16812 | Much Room for MushroomsMid-Atlantic USA Regional 2025Southeast USA Regional 2025South Central USA Regional 2025 | |
| #16813 | One Way OnlyMid-Atlantic USA Regional 2025Southeast USA Regional 2025South Central USA Regional 2025 | |
| #16814 | Orchard FenceMid-Atlantic USA Regional 2025Southeast USA Regional 2025South Central USA Regional 2025 | |
| #16815 | Photo EncodingMid-Atlantic USA Regional 2025Southeast USA Regional 2025South Central USA Regional 2025 | |
| #16816 | Rows of StarsMid-Atlantic USA Regional 2025Southeast USA Regional 2025South Central USA Regional 2025 | |
| #16817 | Shinjuku StationMid-Atlantic USA Regional 2025Southeast USA Regional 2025South Central USA Regional 2025 | |
| #16818 | Snakey StringMid-Atlantic USA Regional 2025Southeast USA Regional 2025South Central USA Regional 2025 | |
| #16819 | Swap for PalindromeMid-Atlantic USA Regional 2025Southeast USA Regional 2025South Central USA Regional 2025 | |
| #16820 | Tree RacingMid-Atlantic USA Regional 2025Southeast USA Regional 2025South Central USA Regional 2025 | |
| #16821 | Welcome SignMid-Atlantic USA Regional 2024Southeast USA Regional 2024South Central USA Regional 2024 | |
| #16822 | Triangles of a SquareMid-Atlantic USA Regional 2024Southeast USA Regional 2024South Central USA Regional 2024 | |
| #16823 | Traffic LightsMid-Atlantic USA Regional 2024Southeast USA Regional 2024South Central USA Regional 2024 | |
| #16824 | Duel of CardsMid-Atlantic USA Regional 2024Southeast USA Regional 2024South Central USA Regional 2024 | |
| #16825 | Which One is LargerMid-Atlantic USA Regional 2024Southeast USA Regional 2024South Central USA Regional 2024 | |
| #16826 | Office BuildingMid-Atlantic USA Regional 2024Southeast USA Regional 2024South Central USA Regional 2024 | |
| #16827 | Intergalactic TeamMid-Atlantic USA Regional 2024Southeast USA Regional 2024South Central USA Regional 2024 | |
| #16828 | Herb MixingMid-Atlantic USA Regional 2024Southeast USA Regional 2024South Central USA Regional 2024 | |
| #16829 | Island MemoriesMid-Atlantic USA Regional 2024Southeast USA Regional 2024South Central USA Regional 2024 | |
| #16830 | Perfect SquaresMid-Atlantic USA Regional 2024Southeast USA Regional 2024South Central USA Regional 2024 | |
| #16831 | PianissimoMid-Atlantic USA Regional 2024Southeast USA Regional 2024South Central USA Regional 2024 | |
| #16832 | Memories of Passport StampsMid-Atlantic USA Regional 2024Southeast USA Regional 2024South Central USA Regional 2024 | |
| #16833 | Elevated RailsMid-Atlantic USA Regional 2024Southeast USA Regional 2024South Central USA Regional 2024 | |
| #16834 | Finding KeysMid-Atlantic USA Regional 2024Southeast USA Regional 2024South Central USA Regional 2024 | |
| #16835 | Virtual Reality PlayspaceMid-Atlantic USA Regional 2024Southeast USA Regional 2024South Central USA Regional 2024 | |
| #16836 | City BikeMid-Atlantic USA Regional 2024Southeast USA Regional 2024South Central USA Regional 2024 | |
| #16837 | Optimized CheatingMid-Atlantic USA Regional 2024Southeast USA Regional 2024South Central USA Regional 2024 | |
| #16838 | Eye ColorVKOSHP 2025 | |
| #16839 | Big World PoliticsVKOSHP 2025 | |
| #16840 | PuzzleVKOSHP 2025 | |
| #16841 | New BallsVKOSHP 2025Interactive | |
| #16842 | Array DepletionVKOSHP 2025 | |
| #16843 | Fibonacci ChocolatesVKOSHP 2025 | |
| #16844 | Magic RitualVKOSHP 2025 | |
| #16845 | Beaver DamVKOSHP 2025 | |
| #16846 | Predicting a PositionVKOSHP 2025 | |
| #16847 | Strange SumVKOSHP 2025 | |
| #16848 | Two Skew RoadsVKOSHP 2025 | |
| #16849 | System of Equations with XORVKOSHP 2025 | |
| #16850 | Mathematical CalendarVKOSHP 2025 | |
| #16851 | Colony of BacteriaVKOSHP 2024 | |
| #16852 | Two-Story Advent CalendarVKOSHP 2024 | |
| #16853 | Intermediate VerticalityVKOSHP 2024 | |
| #16854 | Two ArraysVKOSHP 2024 | |
| #16855 | ClassicsVKOSHP 2024 | |
| #16856 | Exchange and DeletionVKOSHP 2024 | |
| #16857 | M-11 HighwayVKOSHP 2024 | |
| #16858 | Exploration RobotsVKOSHP 2024 | |
| #16859 | PrankVKOSHP 2024 | |
| #16860 | Nightmare SumVKOSHP 2024 | |
| #16861 | Petya's CryptographyVKOSHP 2024 | |
| #16862 | Two ScootersVKOSHP 2024 | |