12 Days of Christmas
394
Abundant Numbers
666
Abundant Numbers (Long)
690
Arabic to Roman
455
Arithmetic Numbers
634
Arrows
658
Ascending Primes
363
Christmas Trees
353
Collatz
750
Divisors
592
Evil Numbers
449
Evil Numbers (Long)
456
Fibonacci
364
Leap Years
461
Rock-paper-scissors-Spock-lizard
479