Mathematical problem



#11

Mathematical problem

I’m asking for a 10 digit number.

The first digit is dividable by 1
The number made by the first and the second digit is dividable by 2.
The number made by the first to the third digit is dividable by 3.
The number made by the first to the fourth digit is dividable by 4.

The number made by the first to the tenth digit is dividable by 10.

Yours
Matthias


#12

on the top of my head, 120450483 might fit the bill (the first few are easy, had to check with i41 for the last digit and 7th). I assumed you meant 'divisible without remainder'. One added challenge could be to require that each digit is only used once, for which i would need a calc and time...

Cheers

Peter


#13

wrong...
Sorry each digit is allowed only once! ;)

Matthias

#14

1020005640 is the first of many, unless I did not understand the question. Does "made by" mean just the sequence of the numbers? Or, the sum of them? Are duplicate numbers allowed? E.g. I used 0 a lot. In my answer 1 divides 1, 2 divides 10, 3 divides 102, etc...


#15

Given the recent post of only each number once then I'd have to say 3816547290. Assuming that made is a sequence of number and not the sum.

Edited: 20 Jan 2009, 7:03 p.m.

#16

Been there, done that ...

Short & Sweet Math Challenge #9: Divisibility !

Regards from V.


#17

Welcome back.


#18

Thanks, Egan, but it won't last ! ... :-)

Best regards from V.


#19

hmm, why? I secretely was looking forward to comments and insight from you on eg Egans little challenge... It was sad to see the ssmc go due to your time co straints, but why go completely silent?

Cheers

Peter


#20

Hi, Peter:

Thanks for your interest, much appreciated, but it's just a matter of available free time and priorities, nothing else.

My free time is as scarce as always, if not more, and after some disheartening events last year all HP calc-related matters went sufficiently down in my priorities list that now I'm just not interested and thus not allocating any time to them.

This may be temporary or not but until such time,

Best regards from V.


Possibly Related Threads...
Thread Author Replies Views Last Post
  The answer to the second semi-mathematical puzzle Mike Reed 3 511 02-18-2013, 02:40 AM
Last Post: Derek Walker (UK)
  Answer to Mathematical Puzzle Mike Reed 2 456 02-08-2013, 12:11 AM
Last Post: LHH
  Including mathematical symbols in forum postings Nick_S 15 1,579 10-18-2012, 03:54 PM
Last Post: Marcus von Cube, Germany
  Horrible mathematical pun Dave Shaffer (Arizona) 4 619 10-09-2012, 07:43 PM
Last Post: Bob Patton
  Check on mathematical identity Namir 21 1,645 08-26-2012, 11:21 AM
Last Post: Les Koller
  HP-28S Mathematical Applications manual errata Tom Sauntry 2 451 07-25-2012, 09:54 AM
Last Post: Tom Sauntry
  NIST Digital Library of Mathematical Functions Eric Smith 6 711 05-16-2010, 12:35 PM
Last Post: Steve S
  AMS Calls for open source mathematical software BruceH 10 871 10-25-2007, 02:48 PM
Last Post: Namir
  Which mathematical functions live out in the suburbs? Bob Wang 4 533 05-28-2007, 07:54 AM
Last Post: Les Wright
  Mathematical Tools Collection Chuck 25 1,886 12-28-2006, 03:56 AM
Last Post: Olivier TREGER

Forum Jump: