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
402
Card Number Validation
420
Christmas Trees
590
Emirp Numbers
353
Fizz Buzz
478
Number Spiral
363
Recamán
543
Sierpiński Triangle
375
√2
680 461