Tag: Find the 2005-th number in this sequence.

August 21, 2019August 21, 2019 M CUBE: Math-e-Matics by Maheshwari INMO, INMO

All possible 6 digit numbers, in each of which the digits occur in non-increasing order (from left to right, eg: 877550) are written as a sequence in increasing order. Find the 2005-th number in this sequence.