Math Forum - Geometry Project of the Month
December 1999 - Painting a Cube
Back in October, for the Geometry Problem of the Week, we used a problem about painting a cube. You can read about it in our archives. The gist of the problem is this:
A bunch of unit cubes are put together to form a larger cube. Some of the faces of the larger cube are painted. Then the large cube is taken apart and 24 of the small cubes have no paint on them at all. How many small cubes were in the large cube and which of the large cube's faces were painted?
As you can read in the solutions, there is only one possible solution to
this problem. Here's your task. Instead of 24 cubes, what is the smallest
number of unpainted cubes for which there is more than one possible answer
to the question (about how many small cubes were in the large cube and how
many of the faces were painted)?
- Rules for Submitting a Solution
- Who is eligible to submit a solution? How must the solutions be submitted?
- How to Submit Your Solution
- Email your solution to firstname.lastname@example.org. You can include graphics, Sketchpad files, text, etc, or make your own web page. However, before you put TOO much work into a "specialized format" (like Microsoft Office or some funky Windows graphics program), send along a sample and see if we can read it.
- Solutions and Prizes
- You can win valuable Math Forum merchandise! We might even do
tie-dyes if your solution is really cool.
Projects and the Winning Solutions
- Check here to see some of the past solutions students have submitted and
learn what it takes to be a winner.
Math Forum Home ||
Math Library ||
Quick Reference ||
Math Forum Search
© 1994-2013 Drexel University. All rights reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.