Puzzle of the Week is a free international puzzle competition for schools. Students submit answers to a puzzle which is published weekly on Mondays. School and student performances are recorded and leaderboards are published on the results page. You can sign your school up for free using the button above or by clicking here.  
All previous puzzles are available with detailed answers including extensions and background information on the puzzle library page.


See how your school is getting on or see the top 100 students worldwide.
Also find lots of statistics about previous competitions.
Puzzle Library
All the previous puzzles are available here with extended solutions and further challenges. They're all in a searchable, filterable format.
Find out more about how Puzzle of the Week works and how easy it is to run at your school.