12 Days of Christmas
722
Abundant Numbers (Long)
588303
476
Arrows
401
Christmas Trees
551
Collatz
679
CSS Colors
315
Divisors
546
Emojify
480
Fibonacci
725932
Fizz Buzz
579820482
Leap Years
398
Rock-paper-scissors-Spock-lizard
460
Roman to Arabic
388
Seven Segment
299
Tongue-twisters
357
United States
337
π
195