12 Days of Christmas
870
Abundant Numbers
727
Christmas Trees
416
Divisors
877
Emirp Numbers
589
Evil Numbers
520
Fibonacci
818
Fizz Buzz
527
598
Happy Numbers
442
Leap Years
652
Morse Decoder
242
Morse Encoder
321
Niven Numbers
495
Odious Numbers
519
Ordinal Numbers
Pangram Grep
521
Pascalβs Triangle
584
Pernicious Numbers
349
Prime Numbers
877
Seven Segment
390
Spelling Numbers
494