How can you decide if finding common multiples and common factors is in solving a problem? explain.

Have made a model (diagram, physical model, or numerical model) of the problem which helps me to visualize the details of the problem

Have answered the question, what do the factors of the numbers in this problem tell me about the situation?  

Have answered the question, what do the multiples of the numbers in this problem tell me about the situation?

Have answered the questions, will breaking the numbers into facotrs help me solve this problem? If so, how?

Have answered the questions, will listing the multiples of the numbers in this problem help me to solve this problem? If so, how?