Pi, a mathematical constant denoted by the Greek letter π, is the ratio of a circle's circumference C to its diameter d: π = ...

A data storage company has decoded more than 100 trillion digits of pi — smashing the world record for calculating the never-ending number. Unraveling this hefty slice of pi required the equivalent ...

Investors and financial analysts often rely on the profitability index (PI) to determine whether the benefits of an investment opportunity outweigh its costs. Essentially, the PI compares projected ...

Pi Day is a favorite holiday for both food lovers and mathematicians. For the foodies, the reasoning is simple. Pi Day brings discounts and deals for people looking to grab a pizza to celebrate the ...

Everyone makes mistakes—and sometimes those mistakes can lead to surprising discoveries. In the early 1990s, while programming the computer game Doom, game developer John Carmack set the value of pi ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...