Abundant Numbers
790
Arithmetic Numbers
790
Card Number Validation
569
Catalan Numbers
663
Christmas Trees
721
Collatz
844
CSS Colors
122
Day of Week
894
Emirp Numbers
439
Emirp Numbers (Long)
525
Evil Numbers
642
Fizz Buzz
989
Leap Years
892
Niven Numbers
658
Pangram Grep
683
Prime Numbers
647
Tongue-twisters
341