Developing Mathematical Inquiry Communities

Below is an example of one of the Independent tasks carried out by the Year 5/6 children in maths this week. We are working on Algebra. Patterns and Relationships.  How would you work this out? 

Litea has a giant bag of M & Ms. She likes to eat her M & Ms in a specific order: red, orange, green, yellow, blue, brown.

What will be the colour of the 87th M & M that she eats?

Find two different ways of solving the task and representations to prove your solutions.