Sweetie Box

Max and Bryony both have a box of sweets. What do you know about the number of sweets they each have?
Exploring and noticing Working systematically Conjecturing and generalising Visualising and representing Reasoning, convincing and proving
Being curious Being resourceful Being resilient Being collaborative

Problem

Below, you can see two boxes.  

 

Image
Sweetie Box

Max's box

   

Image
Sweetie Box

Bryony's box

The box on the left is Max's. All of Max's sweets are in that box.

The box on the right hand is Bryony's. Bryony's sweets are in that box and there are also three more sweets on top of her box.

Each box has exactly the same number of sweets inside.

 

What do you know about the number of sweets each child has? 

We would love to hear your ideas. You may like to use drawings, writing, numbers, symbols... to help show your thinking.

 

This task has been inspired by a book chapter written by Carraher, Schliemann and Schwartz (2007)