1 Round the block Assuming all corners are right angles, what is the shape’s perimeter? 2 Assembly needed Ian Stewart The first shape below can be cut into four identical pieces four blocks long and one wide, which can be fitted back together to...
Welcome to the Guardian’s annual puzzles supplement. Ahead are 30 pages of brainteasers, quizzes, sudokus, children’s puzzles and more. We have contributions from Alex Bellos, who has run a column on the website for more than a decade;...
Instructions Join dots to draw a single continuous closed loop. Each number indicates how many of its sides the pathway must touch. The loop may not branch or bifurcate, and it may not cross itself. Blank spaces may be visited on 0, 1, 2 or 3...
… are these mountains? One point for each mountain, and one for the country (or countries) in which it sits.
Four British cities are represented across these pages. Can you work out which cities they are, and which picture from each cluster is associated with them?