perplexus.info :: Numbers : neves dda tsuj

neves dda tsuj (Posted on 2004-02-22)

You have a simple (base-ten, whole number) calculator which can perform only two operations: visually reversing a number, and adding seven.

Prove that you can use this calcluator to convert any number to 1.

Notation: use ~ to denote reversal, as in
~53 = 35

No Solution Yet Submitted by DJ

Rating: 4.5000 (6 votes)

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
programming solution	Axorion	2004-02-29 13:09:06
re(2): Straightforward , but not so	Richard	2004-02-24 11:44:04
re: Straightforward , but not so "executable" Solution	Ady TZIDON	2004-02-24 11:35:50
Straightforward Solution	Richard	2004-02-23 20:41:28
re(2): --a slight complication IS RESOLVED	Ady TZIDON	2004-02-23 09:18:03
No Subject	Penny	2004-02-23 02:11:20
re: my solution revisited and revised --a slight complication	TomM	2004-02-22 23:52:00
my solution revisited and revised	Ady TZIDON	2004-02-22 22:40:02
remarks: Not the most rigorous proof, but....	Ady TZIDON	2004-02-22 21:51:51
my solution	Ady TZIDON	2004-02-22 17:49:31
Not the most rigorous proof, but....	Penny	2004-02-22 15:04:25

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