Blood Relation — RRB NTPC General Intelligence & Reasoning

• Given: A is B's brother, C is A's father, D is C's sister, E is D's mother.

• Solution:
Step 1: C is the father of A and A is the brother of B. So, C is also the father of B.
Step 2: D is the sister of C, making D the aunt of B.
Step 3: E is the mother of D and C. Thus, E is the grandmother of A and B.
Step 4: The question asks how B is related to E. Since B's gender is not defined (B could be a boy or a girl), the exact relationship cannot be determined.

• Exam Trick: Use `+` for male and `-` for female[span_0](start_span)[span_0](end_span)[span_1](start_span)[span_1](end_span). Since B's gender is not defined by any relation, the answer is 'Cannot be determined[span_2](start_span)'[span_2](end_span).

• Final Answer: Cannot be determined

• Given: M and N are siblings of O. O is P's mother and Q is P's father.

• Solution:
Step 1: Since O is the mother of P and Q is the father of P, O and Q are husband and wife.
Step 2: M is the sister of O (since M, N, and O are siblings).
Step 3: Therefore, M is the sister of Q's wife (O).
Step 4: The sister of a wife is called a sister-in-law.

• Exam Trick: Draw horizontal lines for siblings and double lines `=` for spouses[span_6](start_span)[span_6](end_span)[span_7](start_span)[span_7](end_span). M is the sister of Q's wife, which directly translates to Sister-in-law[span_8](start_span)[span_8](end_span).

• Final Answer: Sister-in-law

• Given: P is father of Q. R is brother of S. T is mother of S and wife of V. T is sister of Q.

• Solution:
Step 1: T is the sister of Q, and P is the father of Q. So, P is also the father of T.
Step 2: T is married to V. Since T is female (mother of S), V is her husband.
Step 3: V is the husband of P's daughter (T).
Step 4: A daughter's husband is a son-in-law.

• Exam Trick: Connect the overlapping nodes. T is P's daughter[span_12](start_span)[span_12](end_span). V is T's husband[span_13](start_span)[span_13](end_span). Therefore, V is P's son-in-law[span_14](start_span)[span_14](end_span).

• Final Answer: Son-in-law

• Given: X and Y are brothers. R is Y's father. S is T's brother and X's maternal uncle.

• Solution:
Step 1: Since X and Y are brothers and R is Y's father, R is also X's father.
Step 2: S is the maternal uncle of X, meaning S is the brother of X's mother.
Step 3: S is the brother of T. So, T must be the mother of X (assuming single parent mapping in standard questions).
Step 4: Since T is the mother of X and Y, and R is their father, T is the wife of R.

• Exam Trick: S is X's maternal uncle (mother's brother)[span_18](start_span)[span_18](end_span). T is S's sister, making T the mother of X[span_19](start_span)[span_19](end_span). R is the father, so T is R's wife[span_20](start_span)[span_20](end_span).

• Final Answer: Wife

• Given: A is B's mother, C is A's son. D is E's brother. E is B's daughter.

• Solution:
Step 1: E is the daughter of B, and D is the brother of E. So, D and E are children of B.
Step 2: A is the mother of B.
Step 3: Since D is the child of B, and A is the mother of B, A is the grandmother of D.

• Exam Trick: Trace the generations upwards using vertical lines[span_24](start_span)[span_24](end_span). D -> B -> A. A is two generations above D and is female (-), so A is the grandmother[span_25](start_span)[span_25](end_span).

• Final Answer: A

• Given: M is P's son. Q is O's granddaughter. O is P's husband.

• Solution:
Step 1: O is the husband of P. So, O (male) and P (female) are a married couple.
Step 2: M is the son of P.
Step 3: Since O is married to P, M is also the son of O.

• Exam Trick: The phrase 'who is the husband of P' refers to O[span_28](start_span)[span_28](end_span)[span_29](start_span)[span_29](end_span). If M is P's son, and O is P's husband, M is directly O's son[span_30](start_span)[span_30](end_span). Q is extra information.

• Final Answer: Son

• Given: `+` = father, `-` = mother, `` = brother, `/` = sister. Expression: P + Q R - S.

• Solution:
Step 1: P + Q means P is the father of Q (1 generation gap upwards).
Step 2: Q * R means Q is the brother of R (same generation).
Step 3: R - S means R is the mother of S (1 generation gap upwards from S).
Step 4: From S to P, the total generation gap is 2 (Mother's Father). P is the maternal grandfather of S.

• Exam Trick: Track the generation gaps: `+` is +1, `*` is 0, `-` is +1[span_34](start_span)[span_34](end_span)[span_35](start_span)[span_35](end_span). Total gap from S to P is +2[span_36](start_span)[span_36](end_span). A gap of +2 with male gender (`+` sign for P) means Grandfather[span_37](start_span)[span_37](end_span).

• Final Answer: Grandfather

• Given: `@` = husband, `$` = wife, `%` = son, `#` = daughter. Expression: M % N @ O # P.

• Solution:
Step 1: M % N means M is the son of N.
Step 2: N @ O means N is the husband of O.
Step 3: O # P means O is the daughter of P.
Step 4: Since N is husband of O, M is the son of both N and O. O is the daughter of P. Thus, M is the son of P's daughter, which makes M the grandson of P.

• Exam Trick: M is a son (`%` sign), so M is male[span_42](start_span)[span_42](end_span). The chain is Son -> Husband -> Daughter. Generational change from P down to M is -2[span_43](start_span)[span_43](end_span). A male two generations down is a Grandson[span_44](start_span)[span_44](end_span).

• Final Answer: Grandson

• Given: Reverse code. `&` means 2nd is father of 1st. `` means 2nd is mother of 1st. `^` means 2nd is brother of 1st. Expression: X & Y Z.

• Solution:
Step 1: X & Y means Y is the father of X.
Step 2: Y * Z means Z is the mother of Y.
Step 3: Therefore, Z is the mother of X's father (Y).
Step 4: The mother of a father is a grandmother (paternal).

• Exam Trick: In reverse coding, read the expression from left to right but apply relations backwards[span_48](start_span)[span_48](end_span). Y is X's father, Z is Y's mother[span_49](start_span)[span_49](end_span). Z is Grandmother.

• Final Answer: Grandmother

• Given: `+` = sister, `-` = father, `*` = brother. Target: H is paternal aunt of T.

• Solution:
Step 1: H must be female. The sign immediately after H should be `+` (sister). This eliminates options with `-` or `*` after H.
Step 2: Check Option 1: H + M - T.
Step 3: H + M means H is the sister of M.
Step 4: M - T means M is the father of T.
Step 5: Therefore, H is the sister of T's father, which makes H the paternal aunt of T.

• Exam Trick: Check the sign immediately to the right of H to confirm gender[span_52](start_span)[span_52](end_span)[span_53](start_span)[span_53](end_span). H needs to be female, so it must be followed by `+`[span_54](start_span)[span_54](end_span). Only option 1 has H + M.

• Final Answer: H + M - T