Puzzles as Community Builders

eMINTS Instructional Specialist Carla Chaffin brings us a great idea to use a puzzle as a community builder from BrainDen.com:

This would be great for a team or community builder with any group. You would not have to actually have the items on hand (scale and tennis balls). The puzzle is more for thinking through.

The puzzle Carla is suggesting is “Weighing IV” and works like this:

Weighing IV.
One of twelve tennis balls is a bit lighter or heavier (you do not know which) than the others. How would you identify this odd ball if you could use an old two-pan balance scale only 3 times?

You can only balance one set of balls against another, so no reference weights and no weight measurements.

The solution to this puzzle can be found here, but please visit BrainDen.com for more puzzles that will make your students think!