What's new

Maths posts

The full fruit bowl brainteaser Brainteaser

by David, 24 July 2019 | 1 comments

Brain icon

There are three types of fruit in the fruit bowl: All pieces of fruit are bananas, except for three of them. All pieces of fruit are apples, except for four of them. All pieces of fruit are oranges, except for five of them.

Continue reading The full fruit bowl brainteaser

Categories:

The speediest cyclist Brainteaser

by David, 10 July 2019 | 0 comments

Brain icon

Alice, Bernice and Claire are all speedy bike riders. They decided to race against each other to find out who is fastest cyclist. They ran three races together. In two races, Alice beat Bernice. In two races, Bernice beat Claire.

Continue reading The speediest cyclist

Categories:

The 63 dollar question Brainteaser

by David, 26 June 2019 | 4 comments

Brain icon

On Dr Vine’s desk there is some money. There are six pieces of Australian money. The money adds up to $63.

Continue reading The 63 dollar question

Categories:

Red and black brainteaser Brainteaser

by David, 12 June 2019 | 12 comments

Brain icon

I have four playing cards: two of them are black and two are red. I turn them face down so you can’t see the colours, and shuffle them so you don’t know which is which.

Continue reading Red and black brainteaser

Categories:

This shape is a lie! Activity

by David, 30 May 2019 | 0 comments

This shape has a little secret. It’s known as a chamfered cube, and it’s not as perfect as it first seems…

Continue reading This shape is a lie!

Categories:

Taping tarps brainteaser Brainteaser

by David, 29 May 2019 | 3 comments

Brain icon

Gerri has two identical square tarpaulins. Unfortunately, these tarps aren’t quite big enough to cover the brand new spa bath. So Gerri’s decided to cut the tarps and tape them together to make a bigger tarp. They want their final tarp to be a square, and they want it to be as big as possible.

Continue reading Taping tarps brainteaser

Categories:

The tooth fairy’s finances News

by David, 23 May 2019 | 0 comments

There’s a lot we don’t know about the tooth fairy. We don’t know what they look like, or how they get around, or even what they do with all the teeth they gather. But researchers around the world have been keeping tabs on the finances of this elusive tooth collector.

Continue reading The tooth fairy’s finances

Categories:

Run an election Activity

by David, 16 May 2019 | 1 comments

Someone is numbering the boxes on a ballot paper

Running an election is a good way to let everyone have a say. In this example, we will be voting for the tastiest vegetable, but if you design your own ballot papers, you can use this method to run an election about anything!

Continue reading Run an election

Categories:

Sibling survey Brainteaser

by David, 15 May 2019 | 3 comments

Brain icon

Emily has twice as many brothers as she has sisters. Her brother Bill has one more sister than he has brothers. How many boys and girls are in Emily and Bill’s family?

Continue reading Sibling survey

Categories:

The triple bounce Brainteaser

by David, 1 May 2019 | 4 comments

Brain icon

I’m thinking of a two digit number. If you add the digits together and then multiply by three, you get the number back again! What number am I thinking of?

Continue reading The triple bounce

Categories: