The 55th Number
Difficulty: Hard · Topics: Discrete Mathematics, Combinatorics, Permutations
A=\1,2,3,4,5,6\
All three-digit numbers with distinct digits from A are listed from largest to smallest. Which number is in the 55th place?
Difficulty: Hard · Topics: Discrete Mathematics, Combinatorics, Permutations
A=\1,2,3,4,5,6\
All three-digit numbers with distinct digits from A are listed from largest to smallest. Which number is in the 55th place?