Engineer's Puzzle

The Puzzle: 60 second puzzle - Getting a date!

Mark , 27/01/2015
So why do you want Zero twice?? that would be a number nine ... if its got a straight leg, its not ...  Read More

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I got one of those cube date calendars things for Christmas. As well being slightly annoying in the fact you have to change the date yourself, so if you forget for a few days you have to guess how long since it was last changed thus defeating the point, it did inspire a quick Engineer's Puzzle.

The question is simple: of the two cubes, how are they numbered so you can have every number from 01 to 31 between the 12 faces of the two cubes. You must always use two cubes. 60 seconds–GO!


So logically you will need 0, 1, and 2 on both dice.

So dice 1 you have: 0, 1, 2, 3, 4, 5

And dice 2 you have: 0, 1, 2, 6, 7, 8

"Wait," I hear you cry, "what about 9!" Well, as any good engineer will know, an upside down 6... yeah!?

Too easy? Well why not email your puzzles to me at
and put your wits against the might of the Engineering Materials readership.

The winner will receive "Passion for Speed" written and personally signed by Pink Floyd drummer Nick Mason (includes a CD of engine and track sounds!)

Getting a date!
Justin Cunningham

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Engineer's Puzzle Entries
I believe that the problem involves always using the 2 dice. Arvind's answer would not produce "07", "08"

Comment Chris, 19/02/2016
why 0 is needed on both dice
dice1 1 2 3 4 5 6
dice 2 0 1 2 7 8 9
is this not correct??????

Comment Arvind, 31/05/2015
Like Mark, I realised you only need a singe zero, so I went for the 12 faces being numbered 0-9, 1 & 2. Maybe the calendar wasn't designed by an Engineer?

Comment Nick, 28/01/2015
So why do you want Zero twice?? that would be a number nine ... if its got a straight leg, its not a upside down six.. Mark

Comment Mark , 27/01/2015




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