# More and More Efficient

Rose was 6 years and
7 months at the time that this video was made.

**The Problem**

There were 5 buses and there were 2 chickens on each bus. How many
chickens are there altogether?

**What To Look For In This Video**

- To model this problem one would first represent the 5 buses, then represent the 2 chickens on each bus, and then count the "chickens."
- I think that Rose started out by counting on her fingers. I think
that she was trying to keep track of how many sets of 2 she had counted
and at the same time keep track of how many "chickens" altogether.
- One, two (that's one set of 2)
- three, four (that's two sets of 2)
- etc.

- After a brief pause, I think that she realized that she could
**more efficiently**solve the problem by counting by 2's.

So Rose has at least two shortcuts for solving this problem - one more efficient than the other.