Why this topic matters · 7 min read
Blood Relations is a consistent topic in IBPS Clerk Reasoning section, typically fetching 2 to 4 questions per exam. Questions appear either as standalone puzzles or embedded inside coded relations. The core skill tested is tracing family trees accurately and decoding who is whose relative. Expect 1 to 2 direct questions and 1 coded relation question. Getting all of them right in under 3 minutes is the goal.
Core Family Relationships to Memorise
Before solving any question, you must have a crystal-clear mental map of standard family terms. Confusing maternal with paternal, or mixing up in-law relations, is the single biggest reason aspirants lose marks here. Think of a family tree as a building: top floors are older generations, bottom floors are younger, and left-right on the same floor means siblings or spouses.
- Parents: Father and Mother. Grandparents: Father's or Mother's parents.
- Siblings: Brother and Sister (same parents). Spouse: Husband or Wife.
- Children: Son and Daughter. Grandchildren: Son's or Daughter's children.
- Uncle or Aunt: Parent's sibling. Nephew or Niece: Sibling's child.
- Cousin: Uncle's or Aunt's child. In-laws: Spouse's family members.
- Son-in-law: Daughter's husband. Daughter-in-law: Son's wife. Brother-in-law: Spouse's brother or Sister's husband.
Solving Direct Blood Relation Questions
In direct questions, a chain of relations is given and you must find the final relationship. The golden rule is to draw a tree or chain diagram, never solve it in your head. Start from the first person mentioned and move step by step. Assign gender carefully — many questions hide the trick in a gender clue buried mid-sentence.
- Always note gender of each person as you go: M for male, F for female.
- Draw arrows from parent to child (top to bottom) and use horizontal lines for spouses.
- Do not assume gender from names — Indian exam names like Ravi, Sita can be used to mislead.
- If the question says only child, no siblings exist — this removes alternate paths.
- Re-read the question stem after drawing to confirm the start and end persons.
- Final answer must state both the relationship AND the gender correctly.
Worked examples
Example: Pointing to a man, a woman says, His mother is the only daughter of my mother. How is the woman related to the man? Step 1: Only daughter of my mother means the woman herself. Step 2: So the man's mother is the woman herself. Step 3: Therefore, the woman is the Mother of the man. Answer: Mother.
Example: A is the brother of B. B is the daughter of C. D is the father of C. How is A related to D? Step 1: A and B are siblings, B is female. Step 2: B is daughter of C, so A is also child of C. Step 3: D is father of C, so D is A's grandfather. Answer: A is the Grandson of D.
Coded Blood Relation Questions
In coded questions, symbols like plus, minus, multiply, divide or letters like P, Q, R are used to represent relationships. A legend is given at the start such as A plus B means A is father of B. You must decode each symbol, then build the family tree. This feels tricky but is fully mechanical once you practice the decoding step separately before drawing.
- Read the legend slowly and write it out before touching the main expression.
- Convert the coded expression left to right, one symbol at a time.
- Draw the tree as you decode — do not hold it all in your head.
- Watch for questions that ask you to find which expression is TRUE — test each option, do not guess.
- Gender clues are often hidden in the code, e.g., A is brother means A is male.
Key formulas
Decode-then-Draw Rule
Symbol meaning written out fully → Person 1 [relation] Person 2 → add to tree → find answer
When: Use this 3-step method for every coded blood relation question without exception
Worked example
Example: If A + B means A is mother of B, A - B means A is husband of B, A x B means A is sister of B. Then in P - Q + R x S, how is P related to S? Decode: P - Q means P is husband of Q. Q + R means Q is mother of R. R x S means R is sister of S. Tree: P (male) married to Q (female). Q is mother of R and S (both children, R is female). So P is the Father of S. Answer: Father.
Puzzles with Blood Relations Mixed into Seating or Arrangement
IBPS Clerk often embeds blood relation clues inside a seating arrangement or linear puzzle. Here the family tree is one part of the solution. Solve the family tree part first on a separate corner of your rough sheet, then plug the relations into the arrangement. Never try to do both simultaneously.
- Mark family members with their gender and generation number on the arrangement diagram.
- A couple always means two people of opposite gender on the same generation level.
- If three generations are mentioned, label them Gen 1 (oldest), Gen 2, Gen 3.
- Use initials to save time — write M or F next to each name.
- These mixed puzzles take 4 to 5 minutes — attempt them after easier standalone questions.
⚠ Common mistakes to avoid
- Assuming gender from Indian names — names like Kiran, Rajan, or Sushil are sometimes used as female characters to create a trap. Always confirm gender from the statement.
- Confusing Brother-in-law: it can mean your spouse's brother OR your sister's husband. Context decides which one applies — re-read the sentence.
- In coded questions, decoding direction matters. A + B means A is father of B is NOT the same as B is son of A in terms of who you write on top of the tree.
- Forgetting that only child means no siblings — aspirants often create an imaginary sibling path when the question says only son or only daughter.
- Rushing through the chain and losing track of the reference person. Always mark who the question is finally asking about before starting.
🧠 Memory aids
- GSCN Tree Levels: Grandparents, Self-generation (parents), Children, Nephews-Nieces. Use these 4 levels to place anyone quickly on your tree.
- For in-laws, remember SP rule: Spouse's family becomes your in-laws, Sibling's spouse also becomes in-law. Two sources, one suffix.
- For coded questions, think of it like a foreign language sentence. First translate every word (symbol), then read the full sentence (draw the tree). Never read and translate at the same time.
- Mnemonic for Nephew vs Niece: Nephew has N like Number (male), Niece has ie like ladies (female). N for boy, ie for girl.
🎯 IBPS CLERK exam tips
- IBPS Clerk typically has 2 to 3 blood relation questions in the Reasoning section. At least one is a simple chain type and one is coded. Expect one more embedded in a puzzle set.
- Time target: Standalone direct questions should take under 60 seconds each. Coded questions should take 90 seconds. If a question crosses 2 minutes, mark and move on.
- Recent IBPS Clerk exams (2022 to 2024) prefer the coded format over simple chain format. Prioritise coded question practice.
- Gender confusion is the number one trap setter in IBPS Clerk blood relation questions. Examiners deliberately use ambiguous names or skip direct gender mentions.
- In sectional timed exams, blood relation questions offer high accuracy for moderate effort. Target 100 percent accuracy here since the logic is fully deterministic — there is always one right answer if you draw the tree correctly.
Q1 · medium · AI-verified
K is the brother of N. N is the sister of M. M is the father of J. How is K related to J?
- Uncle
- Father
- Brother
- Grandfather
Q2 · medium · AI-verified
Pointing to a man, Sita said, 'He is the son of my father's only son.' How is the man related to Sita?
- Brother
- Son
- Nephew
- Cousin
Q3 · medium · AI-verified
Pointing to a woman, Raj said, 'She is the daughter of my grandfather's only son.' How is the woman related to Raj?
- Mother
- Sister
- Cousin
- Aunt
Q4 · medium · AI-verified
Looking at a portrait, Aditi said, 'Anirudh is the father of my grandmother's daughter's niece.' How is Anirudh related to Aditi?
- Brother
- Father
- Uncle
- Cousin
Q5 · medium · AI-verified
If P + Q means P is the brother of Q, P - Q means P is the sister of Q, P × Q means P is the father of Q, and P ÷ Q means P is the mother of Q, then which of the following shows that A is the son of B?
- A + C × B
- B × A
- A × B
- B ÷ A