What's new

Brainteaser posts

When clock hands meet brainteaser Brainteaser

by David Shaw, 24 August 2022 | 2 comments

Brain icon

For an entire day, Ruth watched a dial clock, looking for when the hands met. She wrote down all the times they met. Which hour did the hands not meet?

Continue reading When clock hands meet brainteaser

Categories:

Sneaker discount brainteaser Brainteaser

by David Shaw, 11 August 2022 | 0 comments

Brain icon

Billie is really in to sneakers and is aiming to sell them for a profit. Work out if Billie made money, lost money, or sold the sneakers at their original price.

Continue reading Sneaker discount brainteaser

Categories:

Two candles brainteaser Brainteaser

by David Shaw, 27 July 2022 | 3 comments

Brain icon

Barry has 2 candles that are both 60 centimetres long. One will last for 1 hour, and the other will last for 2 hours.

Barry lights both candles at the same time. Later, he blows them out at the same time.

The next day, Barry realises that one of the candles is half the length of the other.

Assuming they both burnt evenly, how long were they burning for?

Continue reading Two candles brainteaser

Categories:

Five makes 80 brainteaser Brainteaser

by David Shaw, 13 July 2022 | 2 comments

Brain icon

Can you find 5 consecutive (counting upwards) numbers that add up to 80?

Continue reading Five makes 80 brainteaser

Categories:

Two trains brainteaser Brainteaser

by David Shaw, 29 June 2022 | 0 comments

Brain icon

Difficulty: Fun A fast passenger train leaves Sydney Central station, headed for Broken Hill. At the same time, a slow freight train, moving at only half the speed of the passenger train, leaves Broken Hill station, headed for Sydney Central. When they meet, which train is closer to Sydney?

Continue reading Two trains brainteaser

Categories:

Too many elevens brainteaser Brainteaser

by David Shaw, 16 June 2022 | 2 comments

Brain icon

How many 1s does it take to write out the number eleven thousand, eleven hundred and eleven?

Continue reading Too many elevens brainteaser

Categories:

Paying the miller brainteaser Brainteaser

by David Shaw, 2 June 2022 | 2 comments

Brain icon

A farmer goes to the local mill to get some wheat ground into flour. The miller doesn’t ask for money – instead, they take one tenth of the wheat as payment. If the farmer wants 100 kilograms (kg) of flour at the end, how much wheat should they bring?

Continue reading Paying the miller brainteaser

Categories:

Srinivasa’s street brainteaser Brainteaser

by David Shaw, 18 May 2022 | 0 comments

Brain icon

Difficulty: Extreme! Srinivasa lives in a house on a short street, with houses on one side. The houses are numbered 1, 2, 3 and so on. He was practicing his addition when he noticed something strange.

Continue reading Srinivasa’s street brainteaser

Categories:

Solo noughts and crosses brainteaser Brainteaser

by David Shaw, 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…

Continue reading Solo noughts and crosses brainteaser

Categories:

Counting steps brainteaser Brainteaser

by David Shaw, 13 April 2022 | 0 comments

Brain icon

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…

Continue reading Counting steps brainteaser

Categories: