You may also like

problem icon

National Flags

This problem explores the shapes and symmetries in some national flags.

problem icon

Observing the Sun and the Moon

How does the time of dawn and dusk vary? What about the Moon, how does that change from night to night? Is the Sun always the same? Gather data to help you explore these questions.

problem icon

Troublesome Triangles

Many natural systems appear to be in equilibrium until suddenly a critical point is reached, setting up a mudslide or an avalanche or an earthquake. In this project, students will use a simple simulation game to investigate the properties of such systems.

Spot Thirteen

Stage: 2 Challenge Level: Challenge Level:1

Have you watched the way the score changes as you add more and more spots?  This might give you a clue as to what is going on.

Trying to make a very low score might help.

Here is a picture showing the first $9$ spots I tried (in blue):

What do you think the score is so far?  Check using the interactivity.  How does this help?