av-weight-country Published 27 December 2016 at 1145 × 735 in Forget a new £1 coin, we need a £1.23 coin ← Previous Next → Average weight of coins expected as change in each country Jigsaw Jigsaw is a talented chess player and fervent climber. All articles by Jigsaw More from ChalkdustThings to makePlatonic shapes from tube maps, flexagons, and more mathematical craftWhat’s hot and what’s notOptimal Pac-ManGhostbusting with graph theoryReinventing 2DWhat a difference a matrix makesYour social networksHow similar are you to your friends?Art meets maths