*This task follows on from Chocolate for Three.*

Bernard introduces Alison, Charlie and Liz to a new kind of chocolate bar:

When the four of them meet, they decide to share their chocolate equally.

Here are the numbers of squares of chocolate they have each time they meet:

12, 16, 4 and 8

10, 12, 8 and 6

6, 8, 12 and 7

9, 5, 9 and 13

9, 12, 7 and 8

5, 6, 7 and 9

When will they be able to share their chocolate equally?

**Can you create an image (diagram) that helps you decide?**

If Bernard, Alison, Liz and Charlie were sharing a large number of Lego bricks, creating an image to represent all the bricks will take too long...

**Can you create simple diagrams to help you decide if they will be able to share their bricks equally, if**

- Bernard had 21, Alison had 39, Liz had 42 and Charlie had 102 bricks?
- Bernard had 144, Alison had 804, Charlie had 122 and Liz had 160 bricks?
- Bernard had 123, Alison had 87, Charlie had 99 and Liz had 63 bricks?
- Bernard had 321 728, Alison had 992 550, Charlie had 122 819 and Liz had 455 743 bricks?

**Can you explain how you decide if any four large numbers of bricks can be shared equally?**

*You might now like to try Neighbours*