by David, 27 August 2020 | 1 comments

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.

Continue reading Microscope: What is the number before infinity?Categories:

by David, 26 August 2020 | 1 comments

Difficulty: Taxing Here’s a beautiful artwork from 1895, titled Mental calculation. In public school of S. A. Rachinsky, painted by Nikolay Bogdanov-Belsky. Can you solve the puzzle the kids are pondering? If you can’t quite see the equation, here it is:

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by David, 20 August 2020 | 0 comments

Craft yourself a mathematical ring to learn about straight lines on donuts. Don’t laugh, they do exist!

Continue reading Geodesic ringsby David, 19 August 2020 | 0 comments

Difficulty: Tricky Gertrude has a collection of shapes that she likes to arrange in patterns. She starts with a regular hexagon with 10 cm sides, and three regular triangles that also have 10 cm sides. She arranges the triangles around the hexagon, and then lines them up. In the end, one side of each triangle…

Continue reading Playing with shapes brainteaserCategories:

by David, 3 August 2020 | 4 comments

Difficulty: Fun I’m thinking of three numbers. They are consecutive counting numbers. When you add the first two numbers together, you get the third number. What numbers am I thinking of?

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by David, 22 July 2020 | 1 comments

Difficulty: Tricky Ari was 10 on her last birthday, and will be 12 on her next birthday. How can this be true? Lachlan was 8 on his last birthday, and will be 12 on his next birthday. How can this be true?

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by David, 21 July 2020 | 2 comments

Right now, there are about 7.8 billion people on Earth, and that number keeps on growing. But could this growth be coming to an end? Experts have made a new prediction that Earth’s population will not reach 10 billion people. And the reasons why are surprisingly positive.

Continue reading How many people will there be in 2100?Categories:

by David, 16 July 2020 | 0 comments

The best way to do maths is to have fun! Here’s a selection of our favourite games and puzzles.

Continue reading 15 maths games and puzzles to keep your brain pumpingby David, 8 July 2020 | 4 comments

Difficulty: Taxing Terri’s destructive testing lab is very popular. The most important piece of equipment is an electric-powered ram that smashes into samples to see how tough they are. It’s powered by capacitors, and by changing the number of capacitors that are plugged in, Terri can control how powerful the ram is.

Continue reading Crystal strength testing brainteaserCategories:

by David, 24 June 2020 | 3 comments

Difficulty: Fun The extension is finished! Five new classrooms have been added to the main building. But there’s a problem. The corridor to the new classrooms is very busy. When the bell goes, lots of students stream out of the extension, while others rush in. It gets really crowded!

Continue reading Crowded corridor brainteaserCategories: