Want to have the perfect Christmas tree this year? There’s a formula for that, devised by members of the math club at the University of Sheffield, U.K.
In other words, a 180cm (6ft) Christmas tree would need 37 baubles, around 919 cms of tinsel and 565 cms of lights and an 18cm star or angel. Too hard? No problem, there’s an app for that. Find the calculator on this page.