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Question

If A \(B means A is the sister of B, A # B means A is the husband of B and A * B means A is the daughter of B, then what does P\) Q * R # S mean?

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

S is the mother of P.

Decoding Blood Relations: P $ Q * R # S

This question involves decoding a relationship expression using given symbol meanings. Let's break down the symbols and the expression step-by-step to determine the relationship between P and S.

Understanding the Symbols

  • A $ B means A is the sister of B. (A is female)
  • A # B means A is the husband of B. (A is male, B is female)
  • A * B means A is the daughter of B. (A is female)

Analyzing the Expression: P $ Q * R # S

We need to work from right to left to determine the relationships sequentially:

  1. R # S: Based on the definition, R is the husband of S. This tells us that R is male and S is female. They are a couple.
  2. Q * R: Based on the definition, Q is the daughter of R. Since R is married to S, R and S are the parents of Q. Q is female.
  3. P $ Q: Based on the definition, P is the sister of Q. Since Q is the daughter of R and S, and P is Q's sister, P is also the daughter of R and S. P is female because she is Q's sister.

Establishing the Final Relationship

From the analysis:

  • P is the daughter of R and S.
  • Q is the daughter of R and S.
  • P and Q are sisters.
  • R is the husband of S.
  • S is the wife of R and one of the parents of P and Q.

Therefore, S is the mother of P.

Evaluating the Options

Let's examine each option based on our findings:

  • Option 1: S is the mother of P. This matches our conclusion.
  • Option 2: S is the sister-in-law of P. This is incorrect. S is P's mother.
  • Option 3: S is the grandmother of P. This is incorrect. S is P's mother.
  • Option 4: S is the sister of P. This is incorrect. S is P's mother, and P is S's daughter.

Based on the decoding, the correct relationship is that S is the mother of P.

Revision Table: Symbol Meanings

Symbol Meaning Gender of A Gender of B
$ A is sister of B Female Undetermined
# A is husband of B Male Female
* A is daughter of B Female Undetermined

Additional Information: Tips for Solving Blood Relation Questions

Solving blood relation problems involves careful decoding and constructing a mental or physical diagram of the family tree. Here are some tips:

  • Read the definitions of symbols carefully.
  • Break down the expression into smaller segments (e.g., P $ Q, Q * R, R # S).
  • Work through the expression from right to left for clarity, establishing relationships sequentially.
  • Determine the gender of individuals whenever possible based on the definitions (e.g., 'husband' implies male, 'daughter' implies female).
  • Connect the segments to form a complete chain of relationships.
  • Draw a family tree diagram if the relationships become complex.
  • Finally, answer the specific question asked about the relationship between two individuals.
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Similar Questions

  1. Ina certain code language, 
    ‘A+B’ means ‘A is the mother of B’, 
    'A - B' means ‘A is the brother of B’, 
    'A x B’ means ‘A is the wife of B’ and 
    '\(A\div B\)' means ‘A is the father of B'. 
    How is M related to T if ‘M+N x P- \(S\div T\)'?

  2. 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’,

    A ÷ B means ‘A is the father of B’,

    and A # B means ‘A is the daughter of B’.

    How is K related to Q if ‘P × Q ÷ T + Z – S # K’?

  3. 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’.

    Based on the above, how is Q related to T if ‘P + Q – R × S ÷ T’?

  4. 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’.

    Based on the above, how is Q related to T if ‘P – Q × R ÷ S + T’?

  5. 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',
    A ÷ B means 'A is the father of B',
    and A # B means 'A is the daughter of B'.

    How is Q related to J if 'Q + R – P × S ÷ T – J + K'?

  6. In a certain code language, 'A × B' means 'A is the son 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 M related to T if 'M × N - P % S + T'?
  7. If G + H means G is daughter of H, G- H means G is sister H and G * H means G is husband of H, which of the following shows that I is the daughter of H?

  8. If A \(B means A is the husband of B, A # B means A is the brother of B and A * B means A is the mother of B, then what does P\) Q * R # S mean?

  9. If E % F means E is the brother of F, E & F means E is the sister of F  and  E  \( F  means  E   is   the   daughter  of  F,  then  what  does  P%  Q  &  R  \)  S  mean?

  10. If C \(D means C is daughter of D, C & D means C is mother of D and C % D means C is son of D, then what does W\) X & Y % Z mean?


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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