12 Days of Christmas
449
Abundant Numbers (Long)
879
Arithmetic Numbers
397
Arrows
491
Card Number Validation
819
CSS Colors
125
Divisors
790
Game of Life
484
Intersection
689
Inventory Sequence
897
Look and Say
909
Lucky Numbers
632
Odious Numbers
607
Smith Numbers
601
Sudoku
336
Tongue-twisters
347
Zodiac Signs
724
√2
881