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Question

'A + B' means 'B is the father of A'
'A - B' means 'B is the mother of A'
'A # B' means 'B is the sister of A'
'A & B' means 'B is the wife of A'
 If A# B + C & D - E, then how is E related to A?

The correct answer is
Mother's mother

Blood Relation Codes Explained

This question tests your ability to decode relationships based on symbolic representations. Each symbol has a specific meaning defining a family connection. Let's understand each one:

  • A + B means 'B is the father of A'. This indicates that the person on the right side of the '+' symbol (B) is the father of the person on the left side (A).
  • A - B means 'B is the mother of A'. Similarly, the person on the right side of the '-' symbol (B) is the mother of the person on the left side (A).
  • A # B means 'B is the sister of A'. This signifies that the person on the right side of the '#' symbol (B) is the sister of the person on the left side (A).
  • A & B means 'B is the wife of A'. This shows that the person on the right side of the '&' symbol (B) is the wife of the person on the left side (A).

Decoding the Expression: A # B + C & D - E

Now, we will systematically decode the given expression A # B + C & D - E using the relationship codes provided. This process helps build a clear family tree.

  1. A # B: Based on the rule 'A # B' means 'B is the sister of A'. So, A and B are siblings, and B is female.
  2. B + C: The rule 'A + B' means 'B is the father of A'. Applying this to 'B + C', we get 'C is the father of B'. Since A and B are siblings, C is also the father of A.
  3. C & D: The rule 'A & B' means 'B is the wife of A'. Applying this to 'C & D', we get 'D is the wife of C'. As C is the father of A, his wife D must be the mother of A.
  4. D - E: The rule 'A - B' means 'B is the mother of A'. Applying this to 'D - E', we get 'E is the mother of D'.

Final Relationship Determination

Let's combine the deduced relationships to find out how E is related to A:

  • From the previous steps, we determined that D is the mother of A.
  • We also found that E is the mother of D.

Therefore, E is the mother of A's mother. This relationship defines E as A's maternal grandmother.

The question asks for the relationship of E to A. Based on our step-by-step analysis, E is the mother of A's mother.

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Important Questions from Coded Blood Relation Problems

  1. If A @ B means A is the son of B, A # B means A is the husband of B and A * B means A is the daughter of B, then what does P @ Q * R # S mean? 

  2. If P $ Q means P is the husband of Q; P ! Q means P is the mother Q and P * Q means P is the daughter of Q, which of the following shows that Z is brother of W's wife, if Z is male?

  3. If P $ Q means P is the brother of Q; P ! Q means P is the mother Q and P * Q means P is the son of Q, which of the following shows that W is brother of Z?

  4. Read the following information carefully and answer the question given below:

    M * N means ‘ M is the sister of N’

    M % N means ‘ M is the father of N’

    M # N means ‘M is the mother of N’

    Which of the following option gives that, M is father of R?

  5. If ‘A + B’ means ‘A is the mother of B’, ‘A - B’ means ‘A is the father of B’, ‘A × B’ means ‘A is the brother of B’, ‘A & B’ means ‘A is the son of B’, then how is M related to K in the expression ‘N − M + T × L & G & K’?

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