User:Borealbear

Revision as of 15:24, 22 April 2021 by Borealbear (talk | contribs)

AIME Qual


























Congrats on finding this page! Here's a problem I made: \\ Suppose a positive integer with all digits non-zero is considered \textit{almost unique} if there are fewer than $5$ permutations of its digits. For example, $122$ is [i]almost unique[/i] since it has $3$ permutations,($122$, $212$, and $221$), while $123$ is not since it has $6$ permutations, ($123$, $132$, $213$, $231$, $312$, $321$). How many \textit{almost unique} numbers less than $1000000$ are there?