In a group of 23 people, the probability that 2 of them share a birthday is 50%. This fact may seem strange at first, but can be proven by fairly simple mathematics. [Read more…] about The Birthday Paradox

# Maths

## Finding the Circumference of Earth

Eratosthenes made an estimate of the circumference of the earth over 2000 years ago. Using measurements of the angle of shadows in just 2 places, his calculations produce a surprisingly accurate result.

## What is ‘e’?

Euler’s number, e, has a range of applications and is used primarily in exponential functions. The graph of y=e^{x} has a gradient equal to the function, and is therefore **the** exponential function. [Read more…] about What is ‘e’?

## Finding Pi

Although pi has been known for thousands of years, it wasn’t accurately calculated for many years and still mathematicians are calculating pi to more and more decimal places. [Read more…] about Finding Pi

## The Golden Ratio

The golden ratio, approximately 1.618, is found commonly in nature. It is the ratio of two numbers such that the sum of both divided by the largest number is equal to the largest number divided by the smallest. [Read more…] about The Golden Ratio

## Pascal’s Triangle

Pascal’s triangle is a triangle which follows one simple rule, each number is made by adding the two numbers above it together. Named after Blaise Pascal, a mathematician who did a lot of work studying the triangle, it was actually created hundreds of years before. [Read more…] about Pascal’s Triangle