5-1

5-1 can refer to the following:
 * World 5-1 from various games
 * Level 5-1 from various games
 * Stage 5-1 from Donkey Kong for the Game Boy
 * Wavy Beach 5-1 from Super Princess Peach
 * Room 5-1 from Mario vs. Donkey Kong 2: March of the Minis
 * Chapter 5-1 from Super Paper Mario
 * Area 5-1 from Mario vs. Donkey Kong: Mini-Land Mayhem!