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?
i cant get past there being at least rwo possible solutions: Mr X as Engineer and the doctor being either a)the son or b) Mr X's wife.
Both of these options seem to satisfy the 3 points.
If Mr X is the engineer (3) becomes irrelvant. If the doctor is the son, (1) is satisfied. If the doctor is the wife then (1) is irrelevant. If the son is the doctor then (2) is irrelevant. If the wife is the doctor, Mr X can be either older or younger than her without violating (2) as they are not blood relatives.
As to Mr X's mother: If she was the engineer the doctor would (to satisfy 3) have to be a male to be blood related to her (mr x or his son) but if that was the case (1) would be violated.
Old Mrs X would seem ineligible to be either the doctor or th3e engineer for the following reasons:
If Mr X's mother is the doctor then the only possible candidates will be younger, and therefore ineligible (2) as all but Mr X's wife are her blood relatives. Could Mrs X's wife be an engineer and be older than her mother-in-law? Possible, but in that case (3) would be seem to be violated because the two women presumably arent blood relatives. A possibility still exists if Mr X's wife is a cousin of some kind (perhaps old Mrs's X's much older sibling's child?) and thus could still be a blood relative of her mother-in-law. In that case (2) would be irrelevant.
Old Mrs X cannot be an engineer without the doctor being female too (1). Again for (3) to apply, her daughter-in-law would have to be a relative(say,niece or nephew who married her cousin, Mr X). Precluding such scenarios, we will leave out old Mrs X as a candidate for any position and be left with Mr X as engineer and either his wife or his son as doctor.
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