12 Days of Christmas
847
Abundant Numbers (Long)
596303
536
Arrows
331
Christmas Trees
631
Collatz
750
CSS Colors
715
Divisors
588
Emojify
461
Fibonacci
726932
Fizz Buzz
577897481
Leap Years
399
Rock-paper-scissors-Spock-lizard
672
Roman to Arabic
514
Seven Segment
407
Tongue-twisters
639
United States
453
π
219