MathDB
Only choosing large numbers

Source:

April 26, 2022

Problem Statement

Let S=1,2,⋯ ,100.S = {1, 2, \cdots, 100}. XX is a subset of SS such that no two distinct elements in XX multiply to an element in X.X. Find the maximum number of elements of XX.
2022 CCA Math Bonanza Individual Round #3
Back to ProblemsView on AoPS