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Question

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 M related to K if ‘J × K − L ÷ M + N’?

This question was previously asked in
RRB ALP 2025 CBT 2 Wiremen Question Paper (28-Jul-2026) (Shift 2)
The correct answer is
Brother’s daughter

Blood Relation Code: Decoding M's Relation to K

This section provides a step-by-step solution to determine the relationship between M and K based on the given coding rules and expression.

Understanding the Coding Symbols

The problem defines specific relationships for mathematical symbols:

  • 'A + B' signifies 'A is the mother of B'.
  • 'A - B' signifies 'A is the brother of B'.
  • 'A × B' signifies 'A is the wife of B'.
  • 'A ÷ B' signifies 'A is the father of B'.

Analyzing the Expression: 'J × K − L ÷ M + N'

We decode the relationships sequentially:

  1. J × K: This translates to 'J is the wife of K'.
    • This implies J is female and K is male. K is J's husband.
  2. K − L: This translates to 'K is the brother of L'.
    • This confirms K is male. K and L are siblings. L's gender is not yet determined.
  3. L ÷ M: This translates to 'L is the father of M'.
    • This confirms L is male. M is the child of L. M's gender is not yet determined.
  4. M + N: This translates to 'M is the mother of N'.
    • This confirms M is female.

Determining M's Relationship to K

Combining the deduced facts:

  • From 'J × K', K is male.
  • From 'K − L', K is the brother of L.
  • From 'L ÷ M', L is the father of M. Therefore, M is the child of K's brother (L).
  • From 'M + N', M is female.
  • Since M is the child of L, and L is the brother of K, M is K's nephew or niece.
  • Given M is female, M is K's niece.
  • A niece is a brother's daughter. Thus, M is K's brother's daughter.
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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 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?


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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