Solving Blood Relation Puzzles

This question asks us to analyse a set of blood relation codes and an expression to determine which of the given statements is incorrect based on the relationships defined. Let's break down the given information and the expression step by step.

Understanding the Blood Relation Codes

• ‘A + B’ means ‘A is brother of B’
• ‘A - B’ means ‘A is mother of B’
• ‘A × B’ means ‘A is husband of B’
• ‘A ÷ B’ means ‘A is sister of B’

Analysing the Expression: C ÷ B - E + A × F - D

We will decode the expression from left to right:

1. C ÷ B: According to the code, 'A ÷ B' means 'A is sister of B'. So, 'C ÷ B' means C is sister of B. This tells us C is female.
2. B - E: According to the code, 'A - B' means 'A is mother of B'. So, 'B - E' means B is mother of E. This tells us B is female.
3. E + A: According to the code, 'A + B' means 'A is brother of B'. So, 'E + A' means E is brother of A. This tells us E is male. Since B is the mother of E, B is also the mother of A (as E and A are siblings).
4. A × F: According to the code, 'A × B' means 'A is husband of B'. So, 'A × F' means A is husband of F. This tells us A is male and F is female.
5. F - D: According to the code, 'A - B' means 'A is mother of B'. So, 'F - D' means F is mother of D. This tells us F is female.

Synthesizing the Relationships

Let's put all the relationships together:

• C is the sister of B. (C is female)
• B is the mother of E and A. (B is female, E and A are her children)
• E is the brother of A. (E is male)
• A is the husband of F. (A is male, F is female)
• F is the mother of D. (F is female)

From this, we can deduce further relationships:

• A is the son of B.
• A is married to F.
• F is the mother of D. Since A is F's husband, A must be the father of D.
• B is the mother of A, and A is the father of D. Therefore, B is the grandmother of D.
• C is the sister of B. Therefore, C is the sister of A's mother, meaning C is the maternal aunt of A (and E) and the great-aunt of D.

Evaluating the Given Statements

Now let's check each statement against the relationships we deduced from the expression C ÷ B - E + A × F - D.

1. D is the daughter of B.
   • We found that B is the grandmother of D (B is mother of A, A is father of D).
   • This statement says D is the daughter of B, which implies D is a child of B.
   • This contradicts our finding that B is the grandmother of D. Therefore, this statement is NOT correct.
2. C is the sister of the mother of A.
   • The mother of A is B.
   • The statement says C is the sister of B.
   • Our analysis of C ÷ B shows that C is indeed the sister of B. Therefore, this statement is correct.
3. F is the wife of the son of B.
   • B is the mother of E and A. Both E and A are sons of B (E is male, A is male husband of F).
   • The statement says F is the wife of 'the son of B'. A is a son of B.
   • Our analysis of A × F shows that A is the husband of F, meaning F is the wife of A.
   • Since A is a son of B, F is the wife of a son of B. Therefore, this statement is correct.
4. B is the mother of A.
   • Our analysis of B - E + A shows that B is the mother of E, and E is the brother of A.
   • If B is the mother of E and E and A are siblings, then B is also the mother of A.
   • Therefore, this statement is correct.

Based on the evaluation, the statement that is NOT correct is "D is the daughter of B". D is the grandchild of B, not the child.

Conclusion

By decoding the given expression and mapping out the family relationships, we found that only one of the provided statements does not align with the established connections. The statement that is NOT correct is "D is the daughter of B", as D is B's grandchild.

Revision Table: Blood Relation Analysis

Expression: C ÷ B - E + A × F - D

Deduced Relationships:

• C is sister of B
• B is mother of E
• E is brother of A
• A is husband of F
• F is mother of D

Combined relationships: C (sister) <--> B (mother of A & E) --> A (husband of F, father of D) --> D.

Additional Information: Solving Blood Relation Questions

Blood relation questions test your ability to understand and decode complex relationship structures. Here are some tips:

• Break Down the Expression: Decode the expression part by part, identifying the relationship between adjacent people.
• Assign Genders: Use the codes to determine the gender of individuals whenever possible. This helps in clarifying roles like mother, father, son, daughter, husband, wife, brother, sister.
• Draw a Family Tree: Creating a simple diagram or tree structure is often the easiest way to visualize the relationships. Use symbols for gender (e.g., + for male, - for female) and lines for relationships (e.g., double line for marriage, single line for siblings, downward line for parent-child).
• Synthesize Relationships: Combine the smaller relationship pieces to understand the connections between individuals who are not directly linked in the expression.
• Evaluate Statements Carefully: Once you have a clear picture of the family structure, go through each statement provided in the options and verify its correctness based on your diagram or deductions. Pay close attention to words like 'not correct'.
• Practice: The more you practice different types of blood relation problems, the quicker and more accurate you will become at decoding them.