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Question

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- \(S\div T\)'?

This question was previously asked in
RRB NTPC 2024 Undergraduate CBT 1 Question Paper (29-Aug-2025) (Shift 1)
The correct answer is

Father's brother's wife's mother

Understanding the Coding Language

This problem involves a coding language where different symbols represent family relationships. We need to decode a given expression to find the relationship between two individuals, M and T.

Decoding the Symbols

First, let's list down the meanings of the symbols as provided:

Symbol Meaning
\(A+B\) A is the mother of B
\(A-B\) A is the brother of B
\(A \times B\) A is the wife of B
\(A \div B\) A is the father of B

Decoding the Expression: M+N x P - S ÷ T

Now, let's break down the expression '\(M+N \times P - S \div T\)' step by step:

  • M + N: According to the code, this means 'M is the mother of N'.
  • N x P: This means 'N is the wife of P'. Consequently, P is the husband of N.
  • P - S: This means 'P is the brother of S'. Therefore, S is a sibling of P.
  • S ÷ T: This means 'S is the father of T'. Consequently, T is a child of S.

Establishing the Family Connections

Let's combine these relationships to understand the family structure:

  • M is the mother of N.
  • N is married to P (N is P's wife).
  • P is the brother of S.
  • S is the father of T.

From these points, we can infer the following connections relevant to M and T:

  • Since M is the mother of N, and N is married to P, M is the mother-in-law of P.
  • Since P is the brother of S, S is the brother of P.
  • Since S is the father of T, T is the child of S.
  • Combining these: M is the mother of N, N is the wife of P, P is the brother of S, and S is the father of T.

Determining M's Relation to T

We need to find how M is related to T. Let's trace the lineage from T back to M:

  1. T's father is S.
  2. S's brother is P. (So, P is T's paternal uncle).
  3. P's wife is N. (So, N is T's paternal uncle's wife).
  4. M is the mother of N. (So, M is the mother of T's paternal uncle's wife).

Therefore, M is the mother of T's father's brother's wife.

Matching with the Options

Let's look at the options provided:

  1. Father's brother's wife's mother
  2. Father's sister's daughter
  3. Father's brother's wife
  4. Father's brother's wife's sister

Our derived relationship is 'mother of T's father's brother's wife'. This precisely matches the description 'Father's brother's wife's mother'.

In the context of T:

  • T's father is S.
  • T's father's brother is P.
  • T's father's brother's wife is N.
  • T's father's brother's wife's mother is M.

Thus, M is related to T as Father's brother's wife's mother.

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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’,

    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’?

  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’.

    Based on the above, how is Q related to T if ‘P + Q – R × S ÷ T’?

  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',
    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'?

  5. 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'?
  6. 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?

  7. 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?

  8. 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?

  9. 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?

  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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