Perpetual Calendar Quiz Puzzle

This puzzle is very simple to state, but not so easy to solve. In fact it might seem impossible, but there is most definitely a solution.

The challenge is to determine the digits on the faces of two cubes that will allow you to display all the numbers from 1 to 31 - the numbers needed to show the date.

Each face of the cubes has a single digit. The numbers from one to nine must be displayed as 01 - 09. The two cubes can be used in either order, so either cube can be used on the left with the other on the right.

What are the six digits on the faces of the two cubes?

As usual you can post the answer as a comment on this website, reply to the post on Facebook, or retweet or reply on Twitter @quizmastershop.

Answer at 9.00 on Monday


  • Quiz Master Shop

    Both correct – well done

  • Jeff Miner

    The 6 must double as the 9

    0, 1, 2, 3, 4, 5
    0, 1, 2, 6, 7, 8

  • Josh

    There’s probably a few solutions, but I got:

    Die 1:
    Die 2:

    6 can be flipped upside down to also be 9. I can’t find a solution that fits both.

Leave a comment

Please note, comments must be approved before they are published