12 Days of Christmas
488
99 Bottles of Beer
456
Abundant Numbers
297
Christmas Trees
263
CSS Colors
134
Diamonds
208
Divisors
405
Emirp Numbers
Fibonacci
403
Fizz Buzz
437520407
Happy Numbers
219
Intersection
248
Leap Years
387
Morse Decoder
175
Morse Encoder
157
Niven Numbers
323
Prime Numbers
273
Seven Segment
173
Sierpiński Triangle
325
Tongue-twisters
540
United States
159