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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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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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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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Broken calculator Brainteaser

by David, 8 August 2018 | 4 comments

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Imagine your calculator is broken. Although it will still display numbers, only the 4 key, + key, = key and clear key work. Starting at 0, can you get the calculator to display 1000? What’s the fastest way, with the fewest button presses?

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How old is my mum? Brainteaser

by David, 25 July 2018 | 0 comments

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Twenty years ago, my mum was twice my age. I’m 42 years old. How old is my mum?

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Numbers and letterboxes Brainteaser

by David, 11 July 2018 | 0 comments

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Tomas is putting a number on a letterbox. He puts on one digit. Then he adds another digit. Tomas looks at it and notices that it makes a number exactly five times the first digit. Tomas adds a third and final digit. Once again, Tomas looks at the number and notices that the three digit…

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Fractional puppies Brainteaser

by David, 27 June 2018 | 0 comments

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Kelly has a pet store. She recently got in a whole litter of puppies and tried to sell them all. On the first day, she sold half of the puppies, plus half a puppy.

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Which bus? Brainteaser

by David, 13 June 2018 | 4 comments

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I caught a bus the other day with a very interesting number.

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Lots of eights brainteaser Brainteaser

by David, 30 May 2018 | 0 comments

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I want to find a number that is divisible by three. I also want all of its digits to be 8s. Does my number exist?

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