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Question

If G + H means G is the sister of H; G – H means G is the daughter H and G * H means G is wife of H, which of the following shows that Q is the father of P?

This question was previously asked in
RRB ALP 2018 CBT 2 Fitter Question Paper (21-Jan-2019) (Shift 3)
The correct answer is

P + R – S * Q

Understanding Blood Relation Logic

This question asks us to identify which symbolic expression correctly represents the relationship where Q is the father of P. We are given a set of rules for interpreting the symbols: '+' means 'sister of', '–' means 'daughter of', and '*' means 'wife of'. To solve this, we will decode each option step-by-step, determining the relationships between the individuals mentioned in the expression.

Decoding the Symbols

  • G + H means G is the sister of H.
  • G – H means G is the daughter of H.
  • G * H means G is wife of H.

Analyzing Each Option

Let's break down each given option to determine the relationship between Q and P.

Option Expression Decoding Steps Combined Relationship
1 P + R – S * Q
  • P + R: P is the sister of R.
  • R – S: R is the daughter of S.
  • S * Q: S is the wife of Q.
  • R is the daughter of S, and P is the sister of R. This means P is also the daughter of S.
  • S is the wife of Q. This means Q is the husband of S.
  • Since S is the mother of P (as P is her daughter) and Q is the husband of S, Q is the father of P.
Result: Q is the father of P.
2 P * R – S + Q
  • P * R: P is the wife of R.
  • R – S: R is the daughter of S.
  • S + Q: S is the sister of Q.
  • P is the wife of R, and R is the daughter of S. So, P is the daughter-in-law of S.
  • S is the sister of Q.
  • R is the daughter of S. Q is the sister of S. This means Q is R's aunt or uncle.
  • P is R's wife, and Q is R's aunt/uncle. This does not show Q as P's father.
Result: Q is P's father-in-law's sibling (or mother-in-law's sibling). Not Q is father of P.
3 P – R + S * Q
  • P – R: P is the daughter of R.
  • R + S: R is the sister of S.
  • S * Q: S is the wife of Q.
  • P is the daughter of R.
  • R is the sister of S. This means S is P's aunt.
  • S is the wife of Q. So, Q is the husband of S, who is P's aunt.
  • This means Q is P's uncle (by marriage to her aunt). This does not show Q as P's father.
Result: Q is P's uncle. Not Q is father of P.
4 P * R + S - Q
  • P * R: P is the wife of R.
  • R + S: R is the sister of S.
  • S – Q: S is the daughter of Q.
  • S is the daughter of Q.
  • R is the sister of S. Since S is Q's daughter, R, being S's sister, is also Q's daughter.
  • P is the wife of R. Since R is Q's daughter, P is the daughter-in-law of Q.
  • This does not show Q as P's father.
Result: Q is P's father-in-law or mother-in-law. Not Q is father of P.

Conclusion

Based on the step-by-step analysis of each option, the expression P + R – S * Q is the only one that establishes Q as the father of P. In this expression, P is the sister of R, R is the daughter of S, and S is the wife of Q. This chain leads to S being the mother of both R and P, and Q being the husband of S, thus making Q the father of P.

Revision Table: Blood Relations Summary

Symbol Relationship
+ Sister of
Daughter of
* Wife of

Additional Information: Solving Blood Relation Puzzles

Blood relation questions test your ability to understand and interpret complex relationships. When symbols or codes are used, it's crucial to:

  • Carefully note down what each symbol or code represents.
  • Break down the given expression into smaller segments.
  • Determine the relationship for each segment.
  • Combine the relationships sequentially to find the overall relationship between the specified individuals.
  • Drawing a simple family tree or diagram can often help visualize the relationships and avoid errors.
  • Pay close attention to the gender implications of relationships (e.g., 'sister' implies female, 'wife' implies female, 'husband' implies male, 'daughter' implies female, 'father' implies male, 'mother' implies female).

Practicing various types of blood relation puzzles will improve your speed and accuracy in solving these questions in competitive exams.

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Similar Questions

  1. In a certain code language, A + B means ‘A is the mother of B’, A − B means ‘A is the brother of B’, A × B means ‘A is the wife of B’ and A % B means ‘A is the father of B’. How is Shreya related to Mahak if ‘Shreya + Dev − Taran × Harshit % Mahak’?

  2. In a certain code language,
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    A − B means ‘A is the brother of B’,
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    A % B means ‘A is the father of B’.
    How is Satish related to Mayank if ‘Satish + Deep × Piyush – Hitesh % Mayank’?

  3. In a certain code language,
    ‘A + B’ means ‘A is the mother of B’,
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  4. If C% D means C is the mother of D, C $ D means C is the wife of D, and if C & D means C is the son-in-law of D, then what does W % X $ Y & Z mean?

  5. If A $ B means A is the sister of B, A # B means A is the mother of B and if A × B means A is the father of B, then what does P × Q $ R # S mean?

  6. If C $ D means C is the husband of D, C & D means C is the mother of D and C % D means C is the son of D, then what does X % Z $ W & Y mean if W has only one son?
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  8. If I + J means I is the father of J; I – J means I is the son-in-law of J; and I * J means I is the wife of J, then which of the following shows that F is the brother of C, considering that C has only one sibling?

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Important Questions from Coded Blood Relation Problems

  1. ‘A # B’ means ‘A is the son of B’.

    ‘A @ B’ means ‘A is the mother of B’.

    ‘A & B’ means ‘A is the wife of B’.

    ‘A % B’ means ‘A is the sister of B’.

    If ‘M @ R % K # G # N & T’, then which of the following statements is NOT correct?

  2. ‘A % B’ means ‘A is the sister of B’.

    ‘A $ B’ means ‘A is the brother of B’.

    ‘A @ B’ means ‘A is the son of B’.

    ‘A & B’ means ‘A is the mother of B’.

    If ‘R % T & Z $ S @ V @ C % Y’, then which of the following statements is NOT correct?

  3. Read the given information carefully and answer the question that follows.

    ‘K $ D’ means ‘K is the father of D’.

    ‘K < D’ means ‘K is the wife of D’.

    ‘K > D’ means ‘K is the daughter of D’.

    'K @ D’ means ‘K is the son of D’.

    How is S related to N in the expression ‘H > R $ S @ T > N’?

  4. ‘R8S’ means ‘R is the father of S’.

    ‘R7S’ means ‘R is the sister of S’.

    ‘R6S’ means ‘R is the brother of S’.

    ‘R2S’ means ‘R is the wife of S’.

    Which of the following expressions represents ‘X is the mother of Y’?

  5. ‘A # B’ means ‘A is the father of B’.

    ‘A % B’ means ‘A is the mother of B’.

    ‘A @ B’ means ‘A is the sister of B’.

    ‘A & B’ means ‘A is the son of B’.

    If ‘G # M # T % S @ H & R & W @ U’, then which of the following statements is NOT correct?

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