User:Borealbear
Revision as of 17:22, 30 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 if there are fewer than permutations of its digits. For example, is since it has permutations, (, , and ), while is not since it has permutations, (, , , , , and ). How many numbers less than are there?