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The best of 2021 Update

by David Shaw, 29 December 2021 | 0 comments

Photo of a cat crouching on the ground.

The votes are in! Here are our most popular posts from 2021, including news, activities and brainteasers. There’s sure to be something here to tickle your fancy!

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Microscope: What is the number before infinity? News

by David Shaw, 27 August 2020 | 1 comments

Infinity symbol lit in gold and blue light.

By Mike McRae Double Helix magazine is looking for your questions! Our Microscope column answers the most intriguing science, tech, engineering and maths queries you can throw at us.

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Giants! A quick quiz Quiz

by David Shaw, 17 June 2020 | 0 comments

Black lightning bolt in purple circle

There are some giant things lurking in these questions. Some of them are easy to spot, and others are hidden. Can you uncover all the answers?

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Inca quipu numbers Activity

by David Shaw, 6 February 2020 | 0 comments

a lot of knotted strings all tied together.

People record numbers in lots of different ways. This method was used by the Inca people and many others who lived near the Andes Mountains of South America.

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Catching a colossal prime News

by David Shaw, 1 March 2018 | 0 comments

Picture of numbers arranged in a disorganised pattern with some on their sides and some sight side up.

Late last year, Jonathan Pace’s computer found something special. Jonathan is an electrical engineer who also manages computers for charities, so he has a lot of computers, but this one was nothing out of the ordinary. Except for one thing: the computer was running software from the Great Internet Mersenne Prime Search

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Magic calculator Activity

by David Shaw, 27 March 2016 | 0 comments

1+2+8=11

Are you a magician? Or a mathematician! Guess someone’s number with this cool trick.

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