The Kaprekar Numbers hole will go live in . Why not try and solve it ahead of time?

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5,171
4,204
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9 / 109 Holes

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3 / 59 Langs

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4 / 76 Cheevos

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12 Days of Christmas
873
Card Number Validation
523
Christmas Trees
677
Emirp Numbers
435
Fizz Buzz
524
Number Spiral
444
Recamán
602
Sierpiński Triangle
404
√2
689 468