Solving Blood Relation Puzzles with Coded Relationships

This question asks us to identify which coded expression represents the relationship where F is the brother of C, given specific codes for relationships and the constraint that C has only one sibling. Let's break down the given information:

Understanding the Relationship Codes

• I + J: I is the father of J. (I is male, J's gender is not specified by this code)
• I – J: I is the son-in-law of J. (I is male, J's gender is not specified by this code)
• I * J: I is the wife of J. (I is female, J is male)

We are looking for an expression where, based on these rules, F is the brother of C, and C has only one sibling. Let's analyze each option step-by-step.

Analyzing Each Option to Find F as Brother of C

Option 1: C + D – E * F

• C + D: C is the father of D. (C is male)
• D – E: D is the son-in-law of E. (D is male). D married E's daughter. Since C is father of D, this step involves E being the mother-in-law or father-in-law of D.
• E * F: E is the wife of F. (E is female, F is male). So F is the husband of E.

Combining these: C (M) is father of D (M). D (M) is son-in-law of E (F). E (F) is wife of F (M). D, being son-in-law of E, is married to E's daughter. E is married to F. So, D is married to the daughter of E and F. C is the father of D. There is no direct sibling relationship between F and C here. F is the husband of E, who is D's mother-in-law. C is D's father.

Based on Option 1, F is not the brother of C.

Option 2: C * D – E + F

• C * D: C is the wife of D. (C is female, D is male). C and D are married.
• D – E: D is the son-in-law of E. (D is male, consistent). D is married to E's daughter. Since D is married to C, C must be E's daughter. So, E is a parent of C.
• E + F: E is the father of F. (E is male). E is a parent of F.

Combining these: C (F) is wife of D (M). D (M) is son-in-law of E (?). D married E's daughter. Since D married C, C is E's daughter. E is C's parent. E (?) is father of F (?). E (M) is father of F (?). E is F's parent.

So, E (M) is the father of both C (F) and F (?). This means C and F are siblings, and C is female.

From this, we know E is the father of C and F. C and F are siblings, and C is female. The question states that C has only one sibling. This means F is the only sibling C has.

For F to be the brother of C, F must be male. The structure derived from C * D – E + F, combined with the constraint that C has only one sibling (making F that sibling), shows a scenario where F is indeed the brother of C if F is male.

Option 3: C – E * D + F

• C – E: C is the son-in-law of E. (C is male). C married E's daughter.
• E * D: E is the wife of D. (E is female, D is male). E and D are married.
• D + F: D is the father of F. (D is male, consistent).

Combining these: C (M) is son-in-law of E (F). E (F) is wife of D (M). D (M) is father of F (?). C married E's daughter. E and D are parents. Their daughter is the one C married. D is father of F. So F is a child of D. Since E is D's wife, F is also a child of E. F is a sibling of E's daughter whom C married. F is C's brother-in-law or sister-in-law, not brother.

Based on Option 3, F is not the brother of C.

Option 4: C + E – D * F

• C + E: C is the father of E. (C is male).
• E – D: E is the son-in-law of D. (E is male). E married D's daughter.
• D * F: D is the wife of F. (D is female, F is male). D and F are married.

Combining these: C (M) is father of E (M). E (M) is son-in-law of D (F). D (F) is wife of F (M). E is son-in-law of D means E married D's daughter. D is married to F. So E married the daughter of D and F. C is the father of E. There is no direct sibling relationship between F and C here. F is the husband of D, who is E's mother-in-law. C is E's father.

Based on Option 4, F is not the brother of C.

Conclusion

Only Option 2, C * D – E + F, establishes C and F as siblings with E as their father, and C being female. Given the constraint that C has only one sibling, F must be that sibling. For F to be the brother of C, F must be male. The structure derived from Option 2 aligns perfectly with F being the brother of C, satisfying all conditions.

Revision Table: Blood Relation Codes

Additional Information: Solving Blood Relation Puzzles

Blood relation puzzles often involve decoding relationships based on given symbols or phrases. A systematic approach is key:

• Identify the codes and the relationships they represent, paying close attention to gender implications.
• Break down the given expression into smaller parts based on the operators.
• For each part, deduce the relationship between the two individuals and any implied genders.
• Combine the relationships sequentially to build a family structure or derive the relationship between the individuals in question.
• Use diagrams or simple notes to keep track of genders and connections.
• Consider any extra constraints given in the question (like "only one sibling", "unmarried", etc.) as these are often crucial.
• Check if the final derived relationship matches the target relationship stated in the question.

These puzzles test your ability to perform logical deduction based on defined rules. Practice helps in quickly identifying the relationships and genders.