Q–I am going to pour a concrete slab for a patio outside the back door to my home. I want this to be a rectangular shape with perfectly square corners because I will be putting down a foundation and ...

THIS work would have been more correctly described as being “by Eugène Roucheé and Ch. de Comberousse, translated and edited by Richard P. Wright,” &c. But, although Mr Wright can lay small claim to ...

THE Paralogistes pseudomathematicus has become so rare, or possibly so shy, that it is a real pleasure to find that the species is not extinct. Alack! that De Morgan is not with us, to do justice to ...

In 2012, John Collins’ paper plane ‘Suzanne’ was thrown by football player Joe Ayoob. The plane flew a distance of 226 feet and 10 inches, which led to John being declared a Guinness World Record ...