Abundant Numbers
754th
Arithmetic Numbers
654th
Card Number Validation
527th
Catalan Numbers
910th
Christmas Trees
798th
Collatz
828th
CSS Colors
792nd
Day of Week
343rd
Emirp Numbers
1,674th
Emirp Numbers (Long)
771st
Evil Numbers
2,627th
Fizz Buzz
21st
Leap Years
661st
Niven Numbers
2,487th
Pangram Grep
1,178th
Prime Numbers
2,402nd
Tongue-twisters
1,547th