1-3

1-3 can refer to the following:
 * World 1-3 from various games
 * Level 1-3 from various games
 * Stage 1-3 from Donkey Kong for the Game Boy
 * Chapter 1-3 from Super Paper Mario
 * Area 1-3 from Mario vs. Donkey Kong: Mini-Land Mayhem!
 * 1-3 Remix (Athletic), a sample course in Super Mario Maker

1-3