Add new comment

Permalink Submitted by Anil Grover on January 18, 2020

Very well explained!!! Thanks.

Maths in a minute

Want facts and want them fast? Our Maths in a minute series explores key mathematical concepts in just a few words.

Maths in a minute: The information paradox

Explore a mystery that intrigued Stephen Hawking until the end of his life.
Football sweepstakes: Levelling the playing field

With just a few months to go until the UEFA European Cup, here's how you can make your office sweepstake a lot fairer and more exciting.
Metallic numbers: Beyond the golden ratio

You've heard of the golden ratio but have you heard of the silver ratio? And all its other cousins called the metallic numbers? Read this article to meet the family!
A strange definition of perfect

Perfect numbers have foxed mathematicians for over 2000 years. Here's a quick look at the long struggle to find them.
Maths in a minute: Hawking radiation

Nothing, not even light, can escape from a black hole. Or can it? Find out about one of Stephen Hawking's most radical results.