12 Days of Christmas
846
Abundant Numbers (Long)
879
Arithmetic Numbers
397
Arrows
378
Card Number Validation
819
CSS Colors
266
Divisors
790
Game of Life
500
Intersection
741
Inventory Sequence
897
Look and Say
909
Lucky Numbers
632
Odious Numbers
607
Smith Numbers
601
Sudoku
525
Tongue-twisters
520
Zodiac Signs
789
√2
881