TOT 177 1988 Spring Train S3 partition of set of all 10-digit numbers
Source:
May 20, 2020
number theorypartitionSubsetscombinatorics
Problem Statement
The set of all -digit numbers may be represented as a union of two subsets: the subset consisting of all -digit numbers, each of which may be represented as a product of two -digit numbers, and the subset , containing the remaining -digit numbers . Which of the sets and contains more elements?(S. Fomin , Leningrad)