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Posts by David

How did Ancient Minoans write fractions? News

by David, 17 September 2020 | 0 comments

Clay tablet with scratched marks on it.

Around 3500 years ago, the Minoan people lived on the island of Crete. They had a written language, now known as Linear A, which archaeologists cannot decipher. They also had an advanced number system, which experts are finally beginning to crack!

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A magic triangle brainteaser Brainteaser

by David, 16 September 2020 | 1 comments

Brain icon

Difficulty: Tricky We’re going to make a magic triangle! Take the numbers 1–6 and arrange them in a triangle with three numbers on each side. Swap them around until the sides all add up to the same number.

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Shiny egg Activity

by David, 10 September 2020 | 2 comments

Photo of a soot covered egg in a glass of water.

What happens when you cover an egg in soot? It gets super black, but also super shiny!

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Walking on the Sun – a quick quiz Quiz

by David, 9 September 2020 | 0 comments

Black lightning bolt in purple circle

In the southern parts of the world, spring has sprung, and there’s a lot more sunshine about. See how you go with this solar themed quiz!

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International Day of Clean Air for Blue Skies Activity

by David, 3 September 2020 | 0 comments

Girl takign a photo of the clouds at the beach

By Bill Flynn Whether you are at school, at home or self-isolating you can be a part of the United Nations International Day of Clean Air for Blue Skies on Monday 7 September. How? By contributing to NASA’s citizen science global database! Download the GLOBE Observer app and photograph the cloud cover from your window,…

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New Zealand news – a quick quiz Quiz

by David, 2 September 2020 | 2 comments

Black lightning bolt in purple circle

Kia ora! Here’s a quiz for our friends across the ditch. Have you got the knowledge to get 5/5?

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Microscope: What is the number before infinity? News

by David, 27 August 2020 | 0 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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A past puzzle Brainteaser

by David, 26 August 2020 | 1 comments

Brain icon

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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Geodesic rings Activity

by David, 20 August 2020 | 0 comments

A child's hand ontop of a larger hand, both hands are wearing colourful rings

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

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Playing with shapes brainteaser Brainteaser

by David, 19 August 2020 | 0 comments

Brain icon

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…

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