12 Days of Christmas
840
Abundant Numbers (Long)
879
Arithmetic Numbers
397
Arrows
373
Card Number Validation
807
CSS Colors
260
Divisors
790
Game of Life
457
Intersection
696
Inventory Sequence
897
Look and Say
909
Lucky Numbers
632
Odious Numbers
607
Smith Numbers
538
Sudoku
470
Tongue-twisters
508
Zodiac Signs
783
√2
881