Roula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter.

For the Pi Day celebration, East Veterans first- through fifth-graders were challenged with memorizing as many numbers of pi as possible. Home delivery and Digital Access customers of the ...

But when you have this charismatic number like Pi ... there's a lot to explore." Scientists knew for centuries that, regardless of the size of a circle, the circumference and diameter always had ...