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A crowded bus brainteaser Brainteaser

by David, 24 November 2021 | 0 comments

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Difficulty: Fun The number 39 bus was packed as it pulled into the interchange. Then 37 people got off, and another 14 got on. As the bus left the interchange, there were 37 people on board. How many people were on the bus as it pulled into the interchange?

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Joining five dots brainteaser Brainteaser

by David, 10 November 2021 | 2 comments

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Difficulty: Extreme! Ziqi’s teacher loved puzzles, and posed a difficult challenge: “Draw five dots on a piece of paper. Now, connect each dot to every other dot. Each pair of dots needs to be connected by a line, which doesn’t need to be straight.”

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Coloured cups brainteaser Brainteaser

by David, 20 October 2021 | 2 comments

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Difficulty: Tricky Scarlett, Azure and Jett were drinking tea together. There was one scarlet red teacup, one azure blue mug and a jet-black tea glass. None of them had a cup that was the same colour as their own name. After a while, Scarlett offered to get the person with the black glass another drink….

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Reshuffling cars brainteaser Brainteaser

by David, 13 October 2021 | 0 comments

Illustration of Y shaped street with 6 cars labelled A,A,B,B,C&C. The two A cars are in the lower street but want to be in the street on the left. The two B cars are in the left and want to be right and the two C cars are right and want to be on the lower street.

Difficulty: Extreme! Terri runs a car showroom. It has 3 roads to park cars on, which all meet in the middle of the showroom. Terri can fit 3 cars on each road. If she tries to park a fourth, it blocks the intersection in the middle. At the moment, there are 2 Audis on one…

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Time to shake brainteaser Brainteaser

by David, 30 September 2021 | 0 comments

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Difficulty: Tricky Last week, there was an earthquake near Mount Buller in Victoria. The shaking reached central Melbourne around 9:16:30, and Canberra at 9:17:30. It’s 120 kilometres from the earthquake epicentre to central Melbourne, and 360 kilometres from the epicentre to Canberra. From the epicentre to Sydney, it’s 600 kilometres. What time did the shaking…

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How many hats? Brainteaser Brainteaser

by David, 13 September 2021 | 3 comments

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Difficulty: Extreme! The geology club was on its way to check out a fault line. As the minibus cruised down the highway, several club members realised they had forgotten their hats.

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Hungry giraffes brainteaser Brainteaser

by David, 26 August 2021 | 0 comments

Difficulty: Tricky Kimya the giraffe can eat a bale of hay in 3 days. Little Azizi can eat a bale of hay in 6 days. If they both share a bale of hay, how long would it last?

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Starry banner brainteaser Brainteaser

by David, 18 August 2021 | 2 comments

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Difficulty: Tricky Kirk is designing a banner for an astronomy club. They want to put some stars on the banner, in straight lines.

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Shrinking square Brainteaser

by David, 5 August 2021 | 0 comments

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Difficulty: Fun Alex has a square of paper, but it’s a bit too big. To make it smaller, they found the middle of each side, and then ruled lines between them. Then they cut off the four corners along the lines, leaving a square in the middle.

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Back of the train brainteaser Brainteaser

by David, 14 July 2021 | 3 comments

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Difficulty: Tricky Ben is driving his train slowly. He realises he’s left an important package in the last car of the train. He needs to hop out of the train, walk all the way to the back to retrieve it, and then walk to the front of the train again.

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