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Question

‘A + B’ means ‘A is the daughter of B’.

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

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

‘A & B’ means ‘A is the mother of B’.

‘A % B’ means ‘A is the son of B’.

If ‘W @ S % K $ G & U & T @ R + C’, then which of the following statements is correct?

This question was previously asked in
SSC CGL 2020 (Tier-2) Statistics Previous Year Paper 3 (28-Jan-2022)
The correct answer is G is the maternal grandmother of R.

Solving Blood Relations Questions

This question asks us to decipher a series of coded relationships and determine which of the given statements is true based on the established family tree. We are given a set of symbols representing specific blood relations. Let's first understand these definitions:

  • A + B means A is the daughter of B.
  • A $ B means A is the husband of B.
  • A @ B means A is the brother of B.
  • A & B means A is the mother of B.
  • A % B means A is the son of B.

Decoding the Relationship Expression

The given expression is W @ S % K $ G & U & T @ R + C. We need to decode this expression part by part from left to right to build the family tree.

Expression Part Relationship Inference Gender
W @ S W is the brother of S W and S are siblings. W is Male. S's gender is not yet known from this part.
S % K S is the son of K K is a parent of S. S is Male. K's gender is not yet known from this part.
W @ S % K W is brother of S, S is son of K Since W and S are siblings and S is son of K, W is also son of K. K is parent of W and S. W is Male, S is Male. K is parent of W and S.
K $ G K is the husband of G K and G are a married couple. K is Male, G is Female.
S % K $ G S is son of K, K is husband of G K is father of S, G is mother of S. S is Male, K is Male, G is Female.
W @ S % K $ G W is brother of S, S is son of K, K is husband of G W is son of K and G. K is father, G is mother of W and S. W is Male, S is Male, K is Male, G is Female.
G & U G is the mother of U U is a child of G. G is Female. U's gender is not yet known from this part.
W @ S % K $ G & U W, S sons of K & G; G mother of U W, S, U are siblings. K and G are parents of W, S, and U. W is Male, S is Male, G is Female, K is Male. U's gender is not yet known.
U & T U is the mother of T T is a child of U. U is Female. T's gender is not yet known from this part.
G & U & T G mother of U, U mother of T G is the grandmother of T. G is Female, U is Female. T's gender is not yet known.
T @ R T is the brother of R T and R are siblings. T is Male. R's gender is not yet known from this part.
U & T @ R U mother of T, T brother of R U is mother of T and R. U is Female, T is Male. R's gender is not yet known.
R + C R is the daughter of C C is a parent of R. R is Female. C's gender is not yet known from this part.
U & T @ R + C U mother of R, R daughter of C U and C are parents of R. Since U is female, C must be the other parent (father). U and C are married. U is Female, R is Female, C is Male.

Building the Family Tree Diagram

Based on the decoding, we can visualize the family structure:

Generation 1:

  • K (Male) is married to G (Female).

Generation 2:

  • K and G are parents of W (Male), S (Male), and U (Female). W, S, and U are siblings.
  • U (Female) is married to C (Male).

Generation 3:

  • U and C are parents of T (Male) and R (Female). T and R are siblings.

Analyzing the Statements about Relationships

Now, let's evaluate each given statement based on the family tree we have constructed:

  1. G is the maternal grandmother of R.

    G is the mother of U. U is the mother of R. The mother's mother is the maternal grandmother. Therefore, G is the maternal grandmother of R. This statement is correct.

  2. G is the father of W.

    From our decoding, G is female and is the mother of W. K is the father of W. This statement is incorrect.

  3. C is the wife of U.

    From our decoding, U is female and C is male. They are married, and C is the husband of U. This statement is incorrect.

  4. C is the father-in-law of K.

    C is married to U, who is the daughter of K. This means C is the son-in-law of K. The father-in-law would be the father of one's spouse (K) or the husband of one's child (C). K is the father-in-law of C, not the other way around. This statement is incorrect.

Based on the analysis, only the first statement is correct.

Blood Relations Revision Table

Relationship Description
Father's Father Paternal Grandfather
Father's Mother Paternal Grandmother
Mother's Father Maternal Grandfather
Mother's Mother Maternal Grandmother
Father's Brother Paternal Uncle
Father's Sister Paternal Aunt
Mother's Brother Maternal Uncle
Mother's Sister Maternal Aunt
Son's Wife Daughter-in-law
Daughter's Husband Son-in-law
Husband's Sister Sister-in-law
Wife's Brother Brother-in-law

Additional Information on Blood Relations Puzzles

Blood relations questions are a common type of logical reasoning puzzle. They test your ability to understand and interpret coded relationships to deduce the connections between individuals in a family. Here are some tips for solving them:

  • Break down complex expressions into smaller, manageable parts.
  • Determine the gender of individuals whenever possible, as it is crucial for identifying relationships like father, mother, son, daughter, husband, wife, etc.
  • Draw a family tree or diagram to visually represent the relationships. Use symbols for gender (e.g., + for male, - for female) and lines to indicate marriage (e.g., double line) and siblings (e.g., horizontal line) and parent-child (e.g., vertical line).
  • Work step-by-step through the expression, adding individuals and relationships to your diagram as you go.
  • Once the family tree is complete, analyze the statements against the diagram to find the correct one.

Practice is key to mastering blood relations problems. Pay close attention to the definitions of the symbols used in each specific question, as they can vary.

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Similar Questions

  1. If X × Y means that X is the mother of Y, X – Y means that X is the father of Y, X ÷ Y means that X is the sister of Y, then which of the following expression shows that P is the paternal grandfather of R?

  2. ‘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?

  3. A + B means ‘B is the brother of A’;

    A - B means ‘A is the mother of B’;

    A × B means ‘A is the father of B’;

    A ÷ B means ‘ A is the son of B’.

    If, P + R × T - Q ÷ s + U, then how is S related to R?
  4. A + B means ‘A is the mother of B’;

    A - B means ‘A is the husband of B’;

    A × B means ‘A is son of B’;

    A ÷ B means ‘A is the daughter of B’.

    If W × Z + Y ÷ X, then how is X related to Z?
  5. ‘A +B’ means ‘A is the sister of B’

    ‘A - B’ means ‘A is the daughter of B’

    ‘A × B’ means ‘A is the brother of B’

    ‘A B’ means ‘A is the husband of B’

    IfV + U × Q – T + R + P × S, then how is P related to V?
  6. A + B means ‘B is the daughter of A’;

    A - B means ‘B is the sister of A’;

    A × B means ‘B is the husband of A’;

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

    If, P ÷ R × T + Q - S × U + Z, Then how is R related to Z?
  7. A + B means ‘A is the husband of B’;

    A - B means ‘A is the wife of B’;

    A × B means ‘A is the mother of B’;

    A ÷ B means ‘A is the son of B’

    If, W × R × J – S ÷ V + L, Then which of the following statements is NOT correct?
  8. A + B means ‘A is the sister of B’;

    A - B means ‘A is the father of B’;

    A × B means ‘A is the son of B’;

    A ÷ B means ‘A is the Wife of B’

    If, E ÷ F - H + J ÷ G × D, then how is E related to G?
  9. A + B means ‘A is the mother of B’;

    A – B means ‘A is the brother of B’;

    A × B means ‘A is the father of B’;

    A ÷ B means ‘A is the daughter of B’;

    If P – K × Y – J ÷ S + R, then which of the following statements is NOT correct?
  10. ‘A # B’ means ‘A is the sister of B’;

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

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

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

    Which of the following options means ‘J is the father of R’?


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. 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’?

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

    A @ B means ‘A is the son of B’.

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

    A % B means ‘A is the wife of B’.

    If W # Q @ T & Y @ M % K, then how is K related to W?

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