Try many different starting numbers in the flowchart above and write down your findings in an organised way.
1. Which starting number between 5 and 10 will reach one the fastest?
2. Which starting number between 11 and 20 will reach one the fastest?
3. Can you predict which number between 11 and 100 will reach one the fastest?
Topics: Starter  Arithmetic  Investigations  Number
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Teacher, do your students have access to computers such as tablets, iPads or Laptops? This page was really designed for projection on a whiteboard but if you really want the students to have access to it here is a concise URL for a version of this page without the comments: Transum.org/go/?Start=October13 However it would be better to assign one of the student interactive activities below. 

Here is the URL which will take them to a related student activity.
Here is the URL which will take them to some more flowchart usage practice.
Here is the URL for the latest flowchart investigation.