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Question

A + B means 'A is the father of B'.
A * B means 'A is the sister of B'.
A % B means 'A is the daughter of B'.
A $ B means 'A is the son of B'.
If L % M + N * O $ P, then how is L related to P?

This question was previously asked in
SSC CGL 2022 Tier-II (Paper 2 JSO) Previous Year Paper (04-Mar-2023)
The correct answer is

Daughter

Solving Blood Relation Reasoning Questions

This question involves understanding the relationships between individuals based on a set of defined codes. We are given an expression and need to determine the relationship between two specific people mentioned in the expression.

Understanding the Blood Relation Codes

Let's first break down the meaning of each code provided:

  • A + B means 'A is the father of B'. This tells us A's gender is male and they are one generation above B.
  • A * B means 'A is the sister of B'. This tells us A's gender is female and they are in the same generation as B. B's gender is not specified by this relation alone.
  • A % B means 'A is the daughter of B'. This tells us A's gender is female and they are one generation below B. B's gender is not specified by this relation alone.
  • A $ B means 'A is the son of B'. This tells us A's gender is male and they are one generation below B. B's gender is not specified by this relation alone.

Analyzing the Expression: L % M + N * O $ P

Now, let's analyze the given expression part by part from left to right to build the family structure:

1. L % M

Based on the code 'A % B means A is the daughter of B', L % M means L is the daughter of M.

  • L is female.
  • M is the parent of L. M's gender is not yet known from this part.
  • L is one generation below M.

2. M + N

Based on the code 'A + B means A is the father of B', M + N means M is the father of N.

  • M is male.
  • M is the parent of N.
  • N is one generation below M.

Combining with the first part (L % M), we know M is the father of L and M is the father of N. This means L and N are siblings.

3. N * O

Based on the code 'A * B means A is the sister of B', N * O means N is the sister of O.

  • N is female.
  • N and O are siblings.
  • N and O are in the same generation. O's gender is not yet known from this part.

Combining with the previous parts, we have M as the father, and L, N are siblings. Now N is the sister of O, which means O is also a sibling of N and L. So, M is the father of L, N, and O.

4. O $ P

Based on the code 'A $ B means A is the son of B', O $ P means O is the son of P.

  • O is male.
  • P is the parent of O. P's gender is not yet known from this part.
  • O is one generation below P.

We already established that M is the father of O. Now we know O is also the son of P. For O to have two parents, one being M (father) and the other being P, M and P must be married, and P must be O's mother.

Building the Family Tree

From the analysis, we can summarize the relationships:

  • M is the father of L, N, and O.
  • N is the sister of O (and L).
  • O is the son of P.
  • M and P are the parents of O. Since M is the father, P must be the mother.
  • Since M and P are parents of O, and M is the father of L and N, and N is the sister of O, it confirms that M and P are the parents of L, N, and O.

The family structure looks like this:

  • Generation 1: M (Male), P (Female) - They are a couple.
  • Generation 2: L (Female), N (Female), O (Male) - They are siblings, children of M and P. (L is daughter of M & P, N is daughter of M & P, O is son of M & P).

Let's use a table to represent the relationships derived:

Relation Part Relationship Derived Gender Determined
L % M L is daughter of M L (Female)
M + N M is father of N M (Male)
N * O N is sister of O N (Female)
O $ P O is son of P O (Male)

Combining these: M is the father of L and N. N is the sister of O. O is the son of P. If M is father of N and O is also a child of M and P, then M and P are parents. Since M is father, P must be mother. Thus, M and P are parents of L, N, and O.

Determining the Relationship of L to P

The question asks how L is related to P.

From our analysis, P is the mother of L (and N and O).

Therefore, L is the daughter of P.

Conclusion

Based on the given codes and the expression L % M + N * O $ P, L is the daughter of P.

Revision Table - Blood Relation Analysis

Symbol Relationship Gender of 1st Person
+ Father of Male
* Sister of Female
% Daughter of Female
$ Son of Male

Additional Information - Types of Blood Relation Questions

Blood relation questions in reasoning tests typically fall into a few categories:

  • Puzzle-based: A passage describes relationships between several people, and you need to deduce the relationship between two individuals.
  • Code-based: Relationships are represented by symbols or codes, like in this question. You need to decode the expression to determine relationships.
  • Dialogue/Conversation-based: A person points to another person (in a picture or otherwise) and states relationships, e.g., "His mother is the only daughter of my father." You need to figure out the relationship between the speaker and the person pointed out.

Practicing these different types helps in mastering blood relation concepts for competitive exams.

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Similar Questions

  1. Directions: These questions are based on the following information:

    ‘P @ Q’ means ‘Q is the mother of P’.
    ‘P $ Q’ means ‘Q is the husband of P’.
    ‘P # Q’ means ‘Q is the sister of P’.
    ‘P & Q’ means ‘Q is the son of P’.

    If ‘Z # M $ C & D & E’ then how is E related with M?
  2. Directions: These questions are based on the following information:

    'P@Q' means 'Q is the mother of P'.
    'P $ Q' means 'Q is the husband of P'.
    'P#Q' means 'Q is the sister of P'.
    'P & Q' means 'Q is the son of P'.

    If 'A & B @ C & D # E' then how is A related with E?
  3. A - B means A is the sister of B 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 What is the relation in A × B + C?
  4. Directions: Study the following information carefully to answer the given questions:

     If 'A & B' means 'A is the mother of B'

     If 'A $ B' means 'A is the brother of B'

     If 'A # B' means 'A is the sister of B' 

    If 'A @ B' means 'A is the father of B' 

    If 'A % B' means 'A is the daughter of B'

     If 'A * B' means 'A is the son of B' 

    Which of the following means R is a brother of P?

  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 x B’ means ‘A is the wife of B’;

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

    Based on the above, how is S related to P if ‘P x Q ÷ R – S x A’?

  6. In a certain code language, A + B means ‘A is the son of B’, A − B means ‘A is the wife of B’, A × B means ‘A is the brother of B’ and A ÷ B means ‘A is the mother of B’. Based on the above, how is T related to P if ‘P − M + R ÷ T × S’?

  7. In a certain code language,

    ‘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’; and,

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

    Based on the above, how is M related to T if ‘M # N @ L × P + T’?

  8. If,

    'C @ S' means 'C is the father of S',

    'C * S' means 'C is the brother of S',

    'C # S' means 'C is the sister of S',

    'C $ S' means 'C is the daughter of S',

    'C = S' means 'C is the mother of S',

    then how is Z related to Q in the following expression?

    Q $ R @ S * T  $ Z

  9. 'P @ Q' means 'P is the wife of Q'.

    'P # Q' means 'P is the brother of Q'.

    'P $ Q' means 'P is the father of Q'.

    'P - Q' means 'P is the daughter of Q'.

    If Z - B $ D $ G, then how is Z related to G?

  10. ‘A + B’ means ‘Ais brother of B’

    ‘A - B’ means ‘A is mother of B’

    ‘A × B’ means ‘A is husband of B’

    ‘A ÷ B’ means ‘A is sister of B’

    If C ÷ B - E + A × F - D, then, which of the following statements is NOT correct? 


Important Questions from Coded Blood Relation Problems

  1. ‘R+S’ means ‘R is the daughter of S’. ‘R−S’ means ‘R is the husband of S’.‘R × S’ means ‘R is the brother of S’. If ‘T × V + Z’, then which of the following options is true?

  2. 'P × Q' means 'P is the wife of Q'. 'P + Q' means 'P is the father of Q'. 'P ÷ Q' means 'P is the daughter of Q'. 'P - Q' means 'P is the son of Q'. How is E related to I in the expression 'E ÷ F + G - H ÷ I' ?

  3. 'K % L' means 'K is the brother of L', 'K $ L' means 'K is the husband of L', 'K @ L' means 'K is the sister of L', 'K # L' means 'K is the mother of L'.

    How is H related to M in the expression ‘X @ P % T # M $ Y # J @ H’?

  4. If ‘A % B’ means ‘A is the father of B’, ‘A # B’ means ‘A is the brother of B’, and ‘A $ B’ means ‘A is the wife of B’, then how is K related to R in the given expression?

    K $ H % Y # M # R

  5. If 'A + B' means 'A is the daughter of B ', 'A × B' means 'A is the sister of B', and 'A = B' means 'A is the wife of B', then how is G related to R in the expression 'C × G × U + M = R'?

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