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Posts by David

Spotlight spin Brainteaser

by David, 1 April 2020 | 0 comments

Brain icon

Difficulty: Taxing Gillian is running the lights for a big musical. The spotlight has a rotating circle of six frames that she puts filters (like cellophane) in, allowing her to change the light’s colour.

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Maths fun you can have at home Activity

by David, 27 March 2020 | 2 comments

A round ball made of colured paper.

Across Australia and around the world, lots of kids are staying home to help stop the spread of COVID-19. Here are a whole bunch of fun maths activities to keep you busy!

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The strongest! A quick quiz Quiz

by David, 26 March 2020 | 0 comments

Black lightning bolt in purple circle

Strong can mean a lot of different things to scientists. Every question in this quiz has something to do with strength.

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Double Helix hand washing guide News

by David, 23 March 2020 | 0 comments

Photo of a pair of hands washing with lots of soap.

Hand washing is one of the most important tools we have in the fight against COVID-19. Read on for some tips and tricks to keep your hands sparkling!

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The Double Helix COVID-19 explainer Update

by David, 20 March 2020 | 4 comments

Microscopic image of coronavirus stained red.

As part of the media coverage of the new coronavirus disease (COVID-19), we thought it was important to explain the situation for young readers. Here’s a chance to get your head around the biology from the basics.

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Diagonals on a grid Brainteaser

by David, 18 March 2020 | 1 comments

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Moein is messing about with some pieces of graph paper. He’s cut out some rectangles, and he’s ruling a line from the top left corner to the bottom right corner of each piece of paper. Then he plans to count the number of squares that each diagonal goes through.

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How long was a dinosaur’s day? News

by David, 12 March 2020 | 2 comments

Image of a reddy-brown shell or rock.

The dinosaurs lived many millions of years ago. Since then, many things have changed about our planet. The oceans and continents have shifted, ecosystems have changed and lots of species – including dinosaurs – have become extinct. Even the regular patterns of sunrise and sunset might have drifted.

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All sorts – a quick quiz Quiz

by David, 11 March 2020 | 0 comments

Black lightning bolt in purple circle

From the beginning of the universe to your dinner plate, explore all sorts of science trivia in this quiz.

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Infinitely scaling sherbet recipe Activity

by David, 6 March 2020 | 1 comments

Small pile of pink powder on a black surface.

Here’s a fizzy treat for your mouth! But this sherbet recipe has a mathematical trick. You can use it to make as much or as little as you like. Keeping the ingredients in proportion in this way is known as scaling.

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Chocolate cut Brainteaser

by David, 4 March 2020 | 0 comments

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Difficulty: Tricky Dennis and Richard went on a tour of a chocolate factory. At the end of the tour, they went to the reject room, where the tour guide gave Dennis a strange block of chocolate.

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