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Posts by David

Making change Brainteaser

by David, 3 October 2018 | 0 comments

Brain icon

Australia has six coins that are commonly used – 5 cents, 10 cents, 20 cents, 50 cents, $1 and $2. How many different ways can you make exactly 50 cents in Australian coins?

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Look to the stars! – a quick quiz Quiz

by David, 26 September 2018 | 0 comments

Black lightning bolt in purple circle

Feeling bright? This quiz has a couple of star questions that are bound to bend your brain.

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An annoying thing! Activity

by David, 20 September 2018 | 0 comments

A wire and rubber band contraption that is being wound up.

Do you like to prank your friends and family? Give this little contraption a go. It’s the perfect thing to make someone jump, without causing any harm.

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Planning to party Brainteaser

by David, 19 September 2018 | 0 comments

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On Sunday, 1 January, Latda announced her New Year’s resolution. “Throughout this year, on the fifth Sunday of the month, I’ll throw a party!” How many fifth Sunday parties did Latda celebrate that year?

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Why do forests smell so good? News

by David, 13 September 2018 | 0 comments

Image of light filtering through the trees.

There’s nothing quite like the smell of a forest. But the trees aren’t making these smells for your benefit. There’s got to be something in it for them – but what?

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A simple siphon Activity

by David, 6 September 2018 | 0 comments

Three cups of blue liquid, connected by straws. The liquid is darkest in the left cup and palest in the right cup.

Do you have a few leftover plastic cups and straws that you want to keep from turning into waste? Save them up and make a cascading waterfall!

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Peter’s staircase Brainteaser

by David, 5 September 2018 | 0 comments

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Peter’s just finished building a new staircase up to the attic. It just fits along the four-metre-long wall of his lounge room, and it’s three metres tall. It has exactly 15 steps. Peter wants to have a carpet running along the staircase. How long does it need to be?

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What’s cool in space? Asteroids! News

by David, 30 August 2018 | 0 comments

Image of a spacecraft.

Sometimes space missions can seem a bit faddish. Four spacecraft are currently orbiting Mars, and at least three missions are looking for new planets outside our solar system. But the new hotness, it seems, is asteroids.

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Winning at maths News

by David, 23 August 2018 | 0 comments

A gold disc or medal with a bearded man's portrait.

Time to celebrate! For only the second time ever, an Australian has won the most famous prize in mathematics – the Fields Medal. Let’s take a moment to celebrate the achievements of the winner, Akshay Venkatesh.

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A list of letters Brainteaser

by David, 21 August 2018 | 0 comments

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Can you work out the next letter in this sequence? H, T, Q, F, S, S, E, N, … Hint: There are numbers lurking behind those letters. And as it grows, this sequence is shrinking!

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