Are all numbers equally important in arithmetic? What about polygons in geometry?

In arithmetic, you can’t do without one number or geometric figure, nor is there a number or polygon that is "better" than the others. In the world of Mathematopia, however, numbers and polygons live in strictly separate neighbourhoods and there are those among the inhabitants who believe themselves to be better, at the expense of the others. But when the latter leave, then there are problems that are truly impossible to solve.

• A fun way to discover other properties of numbers and polygons.

• A framework that reflects on relationships based on diversity and the unexpected consequences of decisions that have 'social' repercussions.