The day after my birthday, I explained that many visitors dropped by my house to see me on my birthday and that I had a cake to share with them.

The cake needed to be divided into equal portions for sharing with my guests. So I gave them all many rectangular pieces of paper and challenged them to figure out how I would need to divide the cakes equally between:  2 people, 3 people, 4 people, 5 people, 6 people, 7 people, 8 people, 9 people and 10 people.

Here are some photos of what they came up with after working in pairs: