There is no number more metal than six hundred and sixty-six. Thirteen does its best, but there’s something intrinsically metal about 666. It might be the repetition, or it might be that Iron Maiden ...

At first glance, the 153 looks really meaningless. Yet, it has amazing mathematical properties. Moreover, it was not only explicitly mentioned in the Bible and, for various reasons, brings a smile to ...

How a centuries-old math puzzle helped us see inside the human brain. By Steven Strogatz Photo illustrations by Jens Mortensen Each installment of “Math, Revealed” starts with an object, uncovers the ...

We all know the festive carol The Twelve Days of Christmas. Each day, "my true love" receives an increasing number of gifts. On the first day there is one gift, a partridge in a pear tree. On the ...

A 3D shape with all straight edges and flat faces is a polyhedron. Other 3D shapes with least one curved surface are not polyhedra. A 3D shape with regular polygonal faces, meeting at equal angles, is ...