9893
EXPLORE
LATEST
ABOUT
AUTHORING AREA
PARTICIPATE
Your browser does not support JavaScript or it may be disabled!
Trick to Multiply by
N
-1 in Base
N
In base 10, multiplying digits by 9 produces a nice pattern. This Demonstration extends the trick, showing a simple way to multiply by
in base
.
Contributed by:
Izidor Hafner
SNAPSHOTS
DETAILS
Reference
[1] B. A. Kordemsky,
The Moscow Puzzles
, London: Penguin, 1990, p. 91.
RELATED LINKS
Multiplication Table
(
Wolfram
MathWorld
)
Multiplication Table
(
Wolfram Demonstrations Project
)
PERMANENT CITATION
Izidor Hafner
"
Trick to Multiply by
N
-1 in Base
N
"
http://demonstrations.wolfram.com/TrickToMultiplyByN1InBaseN/
Wolfram Demonstrations Project
Published: December 2, 2012
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
The Sum of the First n Odd Numbers
Izidor Hafner
Factorial Number Base
Jim Gerdy
The Base-Phi Number System
Enrique Zeleny
Mixed Base Gray Codes
Michael Schreiber
Adding in a Given Base
Michael Schreiber
Distribution of Palindromes in Base b
Enrique Zeleny
Number Systems Using a Complex Base
Jarek Duda
Comparing the Primes in Base 2
Eric Alexander Küpper
Number of Repeating Digits in Base b Expansion of Fractions
Noel Patson
Number of Digits in Base k Expansion of Fractions
Enrique Zeleny
Related Topics
For Kids
Number Bases
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+