Abundant Numbers
785
Arithmetic Numbers
781
Card Number Validation
569
Catalan Numbers
658
Christmas Trees
717
Collatz
826
CSS Colors
123
Day of Week
900
Emirp Numbers
437
Emirp Numbers (Long)
522
Evil Numbers
640
Fizz Buzz
987
Leap Years
867
Niven Numbers
653
Pangram Grep
677
Prime Numbers
647
Tongue-twisters
342