Trick to Multiply by N-1 in Base N

Initializing live version

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 (December 2012)
Open content licensed under CC BY-NC-SA

Snapshots

Reference

[1] B. A. Kordemsky, The Moscow Puzzles, London: Penguin, 1990, p. 91.


Feedback (field required)

Email (field required)	Name

Occupation	Organization

Note: Your message & contact information may be shared with the author of any specific Demonstration for which you give feedback. Send