12 Days of Christmas
863
Abundant Numbers (Long)
595303
528
Arrows
331
Christmas Trees
632
Collatz
750
CSS Colors
715
Divisors
587
Emojify
461
Fibonacci
725932
Fizz Buzz
579897482
Leap Years
399
Rock-paper-scissors-Spock-lizard
672
Roman to Arabic
514
Seven Segment
407
Tongue-twisters
639
United States
454
π
219