12 Days of Christmas
645
Arabic to Roman
173
Divisors
625
Emirp Numbers
481
Evil Numbers
348
Fibonacci
102288448205292226178242219556239
Fizz Buzz
642
Happy Numbers
508
Leap Years
868
574
Morse Decoder
74
Morse Encoder
259
Niven Numbers
397
Odious Numbers
279
Pernicious Numbers
167
Prime Numbers
273
Roman to Arabic
409
Seven Segment
496