Appreciating Different Approaches

In the feature Learning from Other People's Starting Points, we offer a group of tasks, each with some children's starting points.  We challenge you to continue the methods to a full solution so you get chance to really appreciate different ways to solve the task. 

Below we offer three more tasks.  Have a go at each one and then take a look at the published solutions (click on the 'Solution' tab to the left of the problem title).  

• Which was like yours?
• Find something you like in one of the others.  Why do you like it?
• Which solution do you think is most elegant?  Why?
• If you were given another task like this in the future, would you change the way you solved it?  Why or why not?