QUOTE(KnOwN_StRaNgEr @ Mar 27 2008, 04:24 PM)

You must cut a birthday cake into exactly eight pieces, but you’re only allowed to make three straight cuts, and you can’t move pieces of the cake as you cut it. How can you do it?
very simple...
on top of the cake:
1.up-dwn cut
2. left-right cut
from side of the cake
3. one straight cut to divide cake thickness into two equal parts