Re: Using 2,3,5,7 make 88
- From: CBFalconer <cbfalconer@xxxxxxxxx>
- Date: Wed, 08 Aug 2007 02:28:07 -0400
James Dow Allen wrote:
.... snip ...
Everyone's familiar with solitaires like
"Using four 4's, make the numbers 1 to 20."
As well as addition, subtraction, multiplication and division,
let's assume factorials, exponentiation and concatenation are
allowed.
For example, to make 5 from 1,2,3,4 one option would be
5 = 41 - 3!^2
The following simple-looking ones may be impossible:
Using 1,7,8,9, make 3
Note that I have included the rule - Use each digit once only.
sqrt((1 * 9 / (8 - 7)))
Using 2,4,8,9, make 4
(8 + 2 - 9) * 4
Using 1,5,6,8, make 5
(8 - 6 - 1) * 5
Using 2,5,7,9, make 7
(2 * 5 - 9) * 7
Using 4,7,8,9, make 9
I'll leave this for you to work on. :-)
--
Chuck F (cbfalconer at maineline dot net)
Available for consulting/temporary embedded and systems.
<http://cbfalconer.home.att.net>
--
Posted via a free Usenet account from http://www.teranews.com
.
- Follow-Ups:
- Re: Using 2,3,5,7 make 88
- From: Janmerolant
- Re: Using 2,3,5,7 make 88
- References:
- Using 2,3,5,7 make 88
- From: James Dow Allen
- Using 2,3,5,7 make 88
- Prev by Date: Re: Using 2,3,5,7 make 88
- Next by Date: Re: Using 2,3,5,7 make 88
- Previous by thread: Re: Using 2,3,5,7 make 88
- Next by thread: Re: Using 2,3,5,7 make 88
- Index(es):
Relevant Pages
|
Loading
