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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 Mechanic Motor Vehicle Question Paper (28-Jul-2026) (Shift 1)
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. 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 Shreya related to Mahak if ‘Shreya + Dev − Taran × Harshit % Mahak’?

  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’ and
    A % B means ‘A is the father of B’.
    How is Satish related to Mayank if ‘Satish + Deep × Piyush – Hitesh % Mayank’?

  3. If C% D means C is the mother of D, C $ D means C is the wife of D, and if C & D means C is the son-in-law of D, then what does W % X $ Y & Z mean?

  4. If G + H means G is the sister of H; G – H means G is the daughter H and G * H means G is wife of H, which of the following shows that Q is the father of P?

  5. If A $ B means A is the sister of B, A # B means A is the mother of B and if A × B means A is the father of B, then what does P × Q $ R # S mean?

  6. If C $ D means C is the husband of D, C & D means C is the mother of D and C % D means C is the son of D, then what does X % Z $ W & Y mean if W has only one son?
  7. If C% D means C is the wife of D; C & D means C is the father of D; and If C $ D means C is the daughter of D, then what would X $ Y % W & Z mean if W has only one daughter?

  8. If I + J means I is the father of J; I – J means I is the son-in-law of J; and I * J means I is the wife of J, then which of the following shows that F is the brother of C, considering that C has only one sibling?

  9. 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?


Important Questions from Coded Blood Relation Problems

  1. ‘A # B’ means ‘A is the son of B’.

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

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

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

    If ‘M @ R % K # G # N & T’, then which of the following statements is NOT correct?

  2. ‘A % B’ means ‘A is the sister of B’.

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

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

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

    If ‘R % T & Z $ S @ V @ C % Y’, then which of the following statements is NOT correct?

  3. Read the given information carefully and answer the question that follows.

    ‘K $ D’ means ‘K is the father of D’.

    ‘K < D’ means ‘K is the wife of D’.

    ‘K > D’ means ‘K is the daughter of D’.

    'K @ D’ means ‘K is the son of D’.

    How is S related to N in the expression ‘H > R $ S @ T > N’?

  4. ‘R8S’ means ‘R is the father of S’.

    ‘R7S’ means ‘R is the sister of S’.

    ‘R6S’ means ‘R is the brother of S’.

    ‘R2S’ means ‘R is the wife of S’.

    Which of the following expressions represents ‘X is the mother of Y’?

  5. ‘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?

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