Problems with multiple mental representations

On this page is a list of problems with identified at least two mental representations.

Each problem description contains a definition and overview of each identified representation (preferably with sample solution included).

Problem list

• Simple mathematics
• Fibonacci's numbers
• Multiple linear equations
• Tower of Hanoi
• Collatz Conjecture  
• Size or Depth ball change  

Some thought should be put to these two concepts as well

Neat and Scruffy