12 Days of Christmas
846
Abundant Numbers (Long)
879
Arithmetic Numbers
397
Arrows
373
Card Number Validation
819
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
559
Sudoku
475
Tongue-twisters
514
Zodiac Signs
783
√2
881