diff --git a/003_hamming_distance.lua b/hamming_distance.lua
similarity index 100%
rename from 003_hamming_distance.lua
rename to hamming_distance.lua
diff --git a/001_leap_years.lua b/leap_years.lua
similarity index 100%
rename from 001_leap_years.lua
rename to leap_years.lua
diff --git a/004_prime_numbers.lua b/prime_numbers.lua
similarity index 100%
rename from 004_prime_numbers.lua
rename to prime_numbers.lua
diff --git a/002_resistor_colours.lua b/resistor_colours.lua
similarity index 100%
rename from 002_resistor_colours.lua
rename to resistor_colours.lua