9474
EXPLORE
LATEST
ABOUT
AUTHORING AREA
PARTICIPATE
Your browser does not support JavaScript or it may be disabled!
Two-Cube Calendar
Each face of two cubes is labeled with a single digit from 0 to 9. It is possible to show any date from 01 to 31 on the front faces. The problem is to determine the sum of the digits that cannot be seen.
See the details for a hint.
Contributed by:
Izidor Hafner
SNAPSHOTS
DETAILS
Each cube must have faces with 0, 1, and 2, leaving six faces with 3, 4, 5, 6, 7, 8; the face with 6 can be turned upside down to be 9.
Reference
[1] M. Gardner,
The Colossal Book of Short Puzzles and Problems
, New York: W. W. Norton, 2006 pp. 4, 18.
RELATED LINKS
Digit
(
Wolfram
MathWorld
)
PERMANENT CITATION
Izidor Hafner
"
Two-Cube Calendar
"
http://demonstrations.wolfram.com/TwoCubeCalendar/
Wolfram Demonstrations Project
Published: August 22, 2013
Share:
Embed Interactive Demonstration
New!
Just copy and paste this snippet of JavaScript code into your website or blog to put the live Demonstration on your site.
More details »
Download Demonstration as CDF »
Download Author Code »
(preview »)
Files require
Wolfram
CDF Player
or
Mathematica
.
Related Demonstrations
More by Author
Coloring the Plane with a Rolling Cube
Izidor Hafner
Folding a Dissection of a 1-by-3 Rectangle into a Cube
Izidor Hafner
Mazes on a Cube Given by Six Views
Izidor Hafner
Two Points on a Polyhedron
Izidor Hafner
Hinged Dissection of a Decagon into Two Pentagons and Two Pentagrams
Izidor Hafner
Dissection of Two {8/2}-Prisms into One
Izidor Hafner
Mazes on Polyhedra Seen from Two Viewpoints
Izidor Hafner
Theobald's Dissection of the Net of a Cube to the Net of a Regular Tetrahedron
Izidor Hafner
Number of Cubes Removed
Izidor Hafner
Two Dissections of the Letter E to a Square
Izidor Hafner
Related Topics
Puzzles
Recreational Mathematics
Browse all topics
Note: To run this Demonstration you need Mathematica 7+ or the free Mathematica Player 7EX
Download or upgrade to
Mathematica Player 7EX
I already have
Mathematica Player
or
Mathematica 7+