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Question

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?

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

P is the son of S

Solving Blood Relation Reasoning Problems -

This question involves decoding symbolic relationships to determine the connection between two individuals, P and S, based on a given expression: P% Q & R $ S.

Understanding the Symbols and Relationships

We are given the meaning of three symbols:

  • E % F means E is the brother of F.
  • E & F means E is the sister of F.
  • E $ F means E is the daughter of F.

We need to apply these definitions to the expression P% Q & R $ S.

Breaking Down the Expression: P% Q & R $ S

Let's break the expression into parts and interpret each one:

  1. P% Q: Using the first rule (E % F means E is the brother of F), P% Q means P is the brother of Q. This tells us P is male.
  2. Q & R: Using the second rule (E & F means E is the sister of F), Q & R means Q is the sister of R. This tells us Q is female. Since P is the brother of Q, and Q is the sister of R, P, Q, and R are siblings.
  3. R $ S: Using the third rule (E $ F means E is the daughter of F), R $ S means R is the daughter of S. This tells us R is female and S is her parent (either mother or father).

Combining the Relationships

From the analysis:

  • P, Q, and R are siblings.
  • P is male (brother of Q).
  • Q is female (sister of R).
  • R is female (daughter of S).
  • S is the parent of R.

Since R is the daughter of S and R is a sibling of P, it logically follows that S is also the parent of P and Q. We know P is male (brother of Q). Therefore, P is the son of S.

Determining the Relationship between P and S

Based on the combined relationships, P is the son of S.

Evaluating the Options

Let's check the given options against our conclusion:

  1. P is the daughter of S - Incorrect. P is male.
  2. S is the son of P - Incorrect. S is the parent of P.
  3. S is the daughter of P - Incorrect. S is the parent of P, and P is male.
  4. P is the son of S - Correct. This matches our deduction.

The expression P% Q & R $ S correctly translates to "P is the brother of Q, Q is the sister of R, and R is the daughter of S". This sequence of relationships confirms that P is the son of S.

Revision Table: Understanding Blood Relations

RelationshipDescription
ParentFather or Mother
ChildSon or Daughter
SiblingBrother or Sister
GrandparentParent of a Parent
Aunt/UncleSibling of a Parent
Niece/NephewChild of a Sibling


 

Additional Information: Solving Blood Relation Puzzles

Blood relation problems are common in reasoning sections of competitive exams. They test your ability to understand and interpret complex family relationships based on given information. Here are some tips for solving them:

  • Carefully read and understand the meaning of each symbol or code used to represent relationships.
  • Break down the given expression or statement into smaller, manageable parts.
  • Analyze each part separately to determine the immediate relationship.
  • Combine the relationships step-by-step to build a family tree or diagram mentally or on paper.
  • Pay close attention to the gender of individuals if provided or implied by the relationship (e.g., brother implies male, sister implies female, daughter implies female, son implies male).
  • Trace the path between the two individuals whose relationship is asked.
  • Consider all possibilities unless gender is explicitly stated or implied.

Practicing with different types of blood relation problems will help you improve your speed and accuracy.

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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 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?

  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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