0 votes 0 votes show that for evry n there is a multiple of n such that its decimal expansion has only 0's and 1's. Combinatory pigeonhole-principle kenneth-rosen discrete-mathematics + – Aayushi Aggarwal asked Oct 14, 2016 • edited Mar 6, 2019 by Pooja Khatri Aayushi Aggarwal 364 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.