Abundant Numbers
105th
Arithmetic Numbers
53rd
Card Number Validation
60th
Catalan Numbers
60th
Christmas Trees
88th
Collatz
132nd
CSS Colors
79th
Day of Week
74th
Emirp Numbers
135th
Emirp Numbers (Long)
56th
Evil Numbers
156th
Fizz Buzz
1st
Leap Years
142nd
Niven Numbers
227th
Pangram Grep
103rd
Prime Numbers
191st
Tongue-twisters
151st