Abundant Numbers
794
Arithmetic Numbers
792
Card Number Validation
572
Catalan Numbers
664
Christmas Trees
724
Collatz
848
CSS Colors
260
Day of Week
895
Emirp Numbers
498
Emirp Numbers (Long)
526
Evil Numbers
642
Fizz Buzz
992
Leap Years
893
Niven Numbers
662
Pangram Grep
684
Prime Numbers
647
Tongue-twisters
516