Given a natural number reorder its digits to create another number, closest to the given one.
Extract leading non-zero digit
Is my wife right? Now with even more wrong husband
Omit columns averages from a matrix
Fermat's Last Theorem - Fermat's conjecture
Is it an Armstrong number?
How many solutions has this problem?
Pernicious Anniversary Problem
Calculate the Damerau-Levenshtein distance between two strings.
Pancake sorting - minimum flips.
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