Four Doors
Braingle.com
on
Published in Brain Teasers
The spirit lies behind Door D.
If the spirit is behind Door A, then both B and D are true.
If the spirit is behind Door B, then both A and D are true.
If the spirit is behind Door C, then A, C, and D are all true.
If the spirit is behind Door D, then the statements on all the doors are false, except for that on Door B. This matches the rules, and therefore, the resort hotel spirit lurks behind Door D.
Today's brain teaser courtesy of Braingle.com.
