Abundant Numbers
107th
Arithmetic Numbers
54th
Card Number Validation
64th
Catalan Numbers
61st
Christmas Trees
94th
Collatz
139th
CSS Colors
99th
Day of Week
74th
Emirp Numbers
144th
Emirp Numbers (Long)
61st
Evil Numbers
162nd
Fizz Buzz
1st
Leap Years
145th
Niven Numbers
234th
Pangram Grep
105th
Prime Numbers
196th
Tongue-twisters
153rd