Spotless dice

Upon Amie Albrecht and Cathy Wilton's request, I am writing a blog post about a problem we worked on at One Hundred Factorial recently. A few weeks ago we became interested in problems involving removing spots from dice.

You can read the rest of this blog post and its sequel in PDF form here.

The titles of the two posts are:

• Spotless dice
• A Day of Maths 4: Spotless Dice