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Solo noughts and crosses brainteaser Brainteaser

by David, 5 May 2022 | 0 comments

Brain icon

Difficulty: Tricky Mabel wanted to play noughts (O) and crosses (X), but she didn’t have anyone to play with. So she just took one go after another. Somehow, Mabel put Xs in 6 of the 9 squares without making a line of 3 Xs. Can you draw the board and work out which squares have…

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Counting steps brainteaser Brainteaser

by David, 13 April 2022 | 0 comments

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Difficulty: Tricky Willow has a staircase with 7 steps. She likes to walk down the staircase in different ways. Sometimes she takes 1 step at a time, and other times she skips a step and goes 2 at a time. If Willow mixes up these 2 types of steps, how many different ways can she…

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Oranges brainteaser Brainteaser

by David, 24 March 2022 | 0 comments

several wooden crates overflowing with oranges

Difficulty: Extreme! These 2 brothers sold oranges for a living. On Monday: Josh priced his oranges at 2 for $3. He sold 30 oranges for $45. Zach priced his oranges at 3 for $4. He sold 30 oranges for $40. On Tuesday, they combined their prices, and sold their oranges in groups of (2 +…

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Messy measuring Activity

by David, 17 March 2022 | 0 comments

Green wire laying on a messy grid of lines

Rulers are great at measuring straight lines, but how do you measure a curvy line? Here’s one way, using a wonderfully messy diagram!

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How many squares fit in a rectangle? News

by David, 10 March 2022 | 0 comments

A rectangle of coloured squares diminishing in size

It might seem like a silly question to ask. After all, it depends on how big the rectangle is, and also the size of the squares you’re packing it with. With a big rectangle and small squares, you could fit a million, a billion or even more. But what if you have infinity squares? Is…

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Jasper’s shapes brainteaser Brainteaser

by David, 9 March 2022 | 0 comments

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Difficulty: Tricky Jasper had a regular (sides and angles all the same) hexagon with 10-centimetre sides, and 3 regular triangles with 10-centimetre sides. He put the side of a triangle against every second side of the hexagon. How many sides did this final shape have?

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Connection conniption! Activity

by David, 24 February 2022 | 1 comments

A tecup with 3 houses drawn on it. there are 3 different whiteboard markers inside the cup

Do you have a favourite mug? This is my favourite. Not only does it hold my hot chocolate, it has a wicked tricky puzzle on it!

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School uniform brainteaser Brainteaser

by David, 23 February 2022 | 1 comments

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Difficulty: Tricky Keira is getting ready for school: She has 3 different shirts – one black, one white and one red. She has 3 different pairs of pants – one black, one white and one red. She has 3 different pairs of shoes – one black, one white and one red.

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Bubble pop Nim Activity

by David, 10 February 2022 | 0 comments

Coloured plastic toy with 3 rows of 3 circles

Here’s an old game with a modern twist! Compete with your friends to pop the last bubble.

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Flight tracker brainteaser Brainteaser

by David, 9 February 2022 | 0 comments

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Difficulty: Tricky Last week I flew from Canberra to Brisbane. The plane took off at 2.00 pm, flew 1,800 kilometres at 900 kilometres per hour, and landed at 3.00pm. On the way home from Brisbane, the plane took off at 8.00 pm. Assuming it flew at the same speed, when did it land in Canberra?

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