# Where can i find theory&logic subforum

1. Aug 11, 2008

### some_one

where can i find theory&logic subforum?

2. Aug 11, 2008

### cristo

Staff Emeritus
Here is the Set Theory, Probability and Logic subforum.

3. Aug 11, 2008

### some_one

i was told that in the Probability and Logic subforum
i can ask question like this one:
==========================
mary bought ten books

5 pairs of books
each pair of books has its own colors
a yellow pair ,a purple pair ,a black pair ,a blue pair, a red pair (10 books )
she decided to arrange them on 4 shelves ,but there are rules for arranging them

two books of the same color will not be on the same shelf
a yellow book cannot be on the same shelf with a purple shelf
a blue book will always be with a red book
in each shelf the amount of books will not exceed 3 books

what arrangement cannot happen if we know that on one self we have a purple and a blue books?
A.there is another shelf which has a purple and a blue book on it
B.there is a black book next to a red book
C.there is a yellow book next to a black book
D.there is a purple book next to a black book
==============================================
is it here??

4. Aug 11, 2008

### Staff: Mentor

5. Aug 11, 2008

### some_one

is there "theory&logic subforum"

i cant find it

6. Aug 11, 2008

### some_one

ooohh sorry i didnt see the link