There are 20 pigs on the farm and there are 4 pens.
If there is at least 1 pig in each pen, how many different combinations can you find?
I used Lego to do this maths problem. I hope you like it.
I used the Lego as my 20 pigs and the ice cream containers lid as the 4 paddocks. I moved the lego pigs around to find different combinations