Results 1 to 10 of 10
 12232011, 08:25 PM #1Senior Member
 Join Date
 Nov 2011
 Location
 Turkey
 Posts
 380
 Blog Entries
 24
 Rep Power
 9
 12232011, 08:39 PM #2
 Join Date
 Sep 2008
 Location
 Voorschoten, the Netherlands
 Posts
 14,422
 Blog Entries
 7
 Rep Power
 28
Re: How would you solve this? Java coding for multiplication.
It cannot be solved because the righrmost digit in the fourth row has to be a zero.
kind regards,
JosBuild a wall around Donald Trump; I'll pay for it.
 12232011, 08:41 PM #3Senior Member
 Join Date
 Nov 2011
 Location
 Turkey
 Posts
 380
 Blog Entries
 24
 Rep Power
 9
Re: How would you solve this? Java coding for multiplication.
What makes you think that?
I am sure it is a "can be solved" question.
 12232011, 08:59 PM #4Moderator
 Join Date
 Feb 2009
 Location
 New Zealand
 Posts
 4,716
 Rep Power
 18
Re: How would you solve this? Java coding for multiplication.
 12232011, 09:02 PM #5Senior Member
 Join Date
 Nov 2011
 Location
 Turkey
 Posts
 380
 Blog Entries
 24
 Rep Power
 9
 12232011, 09:08 PM #6
 Join Date
 Sep 2008
 Location
 Voorschoten, the Netherlands
 Posts
 14,422
 Blog Entries
 7
 Rep Power
 28
Re: How would you solve this? Java coding for multiplication.
The last digit of the top two numbers have to be a 3 and a 5 (...3x..5 = ....5 (or ..5x.3 = ....5 is the only possibility), so the last digit of the result is 5 as well. Maybe consistent reasoning like this can help you to solve this puzzle. If there are too many alternatives I'd take the lazy approach (brute force)
kind regards,
JosBuild a wall around Donald Trump; I'll pay for it.
 12232011, 09:11 PM #7Senior Member
 Join Date
 Nov 2011
 Location
 Turkey
 Posts
 380
 Blog Entries
 24
 Rep Power
 9
Re: How would you solve this? Java coding for multiplication.
I am trying to solve it with Java :)
Thanks though... :)
I have this idea of looping for all numbers in the first 2 rows and multiplying them and to check if they are all prime numbers(2,3,5,7)..
But can there be a better approach ?
 12232011, 09:15 PM #8Moderator
 Join Date
 Feb 2009
 Location
 New Zealand
 Posts
 4,716
 Rep Power
 18
Re: How would you solve this? Java coding for multiplication.
Totally slow answer adding nothing removed.
@OP: That's more or less what I would do.Last edited by pbrockway2; 12232011 at 09:17 PM.
 12232011, 09:30 PM #9
 Join Date
 Sep 2008
 Location
 Voorschoten, the Netherlands
 Posts
 14,422
 Blog Entries
 7
 Rep Power
 28
Re: How would you solve this? Java coding for multiplication.
There are four different digits (2, 3, 5 and 7) so you should count in base 4. There are 4x4x4 possible first numbers and 4x4 possible second numbers. You can try them all after mapping 0 > 2, 1 > 3, 2 > 5 and 3 > 7 and see which numbers have the correct result.
kind regards,
JosBuild a wall around Donald Trump; I'll pay for it.
 12232011, 09:34 PM #10Senior Member
 Join Date
 Nov 2011
 Location
 Turkey
 Posts
 380
 Blog Entries
 24
 Rep Power
 9
Similar Threads

Coding sms in java?
By strictlydivine.elite in forum Advanced JavaReplies: 2Last Post: 11182010, 02:10 PM 
does gui coding in netbeans is just the same with coding without nebeans?
By maizuddin35 in forum NetBeansReplies: 4Last Post: 10252010, 03:49 PM 
java coding
By zawad in forum Suggestions & FeedbackReplies: 1Last Post: 07072009, 01:55 PM 
Coding Java on a Mac
By Menre in forum New To JavaReplies: 5Last Post: 05062008, 05:49 AM 
Cannot solve the coding problem of my assignment
By elimmom in forum New To JavaReplies: 3Last Post: 08132007, 11:33 AM
Bookmarks