You have 8 cards (pieces of paper) numbered from 1 to 8. The first 4 are all white, and the last 4 are all black. On each one is written:

#1: The next two cards are black.
#2: The next two cards are of different colors.
#3: The previous card has the same color as the next.
#4: There are the same number of black cards before and after this one.
#5: The previous card is of the same color as the next.
#6: The previous card is white.
#7: The next two cards are of the same color.
#8: The previous card is black.

Arrange the 8 cards in a row so that all the sentences result truthfully.

(In reply to Logical solution by Steve Herman)

Tk you, Steve. I solved it by reasoning too, a little different line from yours.

I would like to know (just as curiosity, since I´m from the time of Cobol, Fortran, Assembler... if you understand what I´m talking about!!!) how to programme this and other type of problems I see in this site. It seems that there are no limits, virtually, to what Charlie can do with the language he uses.

Posted by pcbouhid on 2009-02-01 08:02:20