In which I try to explain how to subtract 9 from 25.

# Writing tagged: ‘mathematics’

## 322

hat's how many plastic bags were reused by the customers of the Prestwich branch of Tesco last week.

## 1, 2, 3, 4, __

What's the missing number?

## Are Euclid-ing me?

New Scientist interview with mathematician Christopher Zeeman.

## Innumerate

One in 14 adults cannot answer a maths question aimed at eight-year-old children.

## Dimensional delusions

Adding cream cakes to the colour blue.

## The New Year Formula

How to work out what year it will be next year.

## Here's looking at Euclid

Lively 2,300-year-old proof that there is an infinite number of primes.

## Exposing the 'fib' in 'Fibonacci'

Fibonacci numbers in nature are sometimes myths.

## As easy as pi

Richard fails to explain the significance of pi.