Library / /67 of 99

, 2023

Combinatorics Difficulty 3.0 AMC 10/12 Prove it United Kingdom

How many positive integers are there whose digits do not include $0$ , and whose digits have sum $6$ ?

Want a route through all this instead of an archive? The track puts 2,604 problems in a working order, from Junior Challenge level to the IMO shortlist.

Source: UK Mathematics Trust, licensed © UK Mathematics Trust; past papers published free at ukmt.org.uk. Statement reproduced verbatim; metadata (topic, difficulty) added by this project. Solutions are the publisher's, linked not copied.