One of Mr. X, his wife, their son and Mr. X's mother is an Engineer and another is a Doctor.
1. If the Doctor is a male, then the Engineer is a male.
2. If the Engineer is younger than the Doctor, then the Engineer and the Doctor are not blood relatives.
3. If the Engineer is a female, then she and the Doctor are blood relatives.
Can you tell who is the Doctor and the Engineer?

The answer must be 'No'
Clue one tells us that the engineer can only be female if the doctor is (mrs x and mother in law) but clue 3 discludes this since they're not blood.
The engineer is therefore male and not the son (who's blood with all)(clue 2)
We can now throw away clue 1 since we've concluded the engineers gender and clue 3 is now nonsense. Both scenarios (older doctor wife/son as doctor) hold so we can't conclude unless we read 'younger' as a generation gap.
just my 2p

Posted by Lee on 2003-08-28 01:00:09