1. WHY RELATIONSHIP QUESTIONS MATTER

RELATIONSHIP CONCEPTS – QUICK‑REVISION NOTES

(Tailored for JKSSB Social Forestry Worker – Basic Reasoning Section)

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1. WHY RELATIONSHIP QUESTIONS MATTER

• Test analytical thinking, ability to visualise family structures, and logical deduction.
• Usually 2–4 marks per question; high scoring if you master the shortcuts.
• Appear in both direct (statement‑based) and puzzle (multiple‑clue) formats.

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2. CORE TERMINOLOGY (MEMORISE THESE)

Symbol / Abbreviation	Meaning	Example
F	Father	F of X = father of X
M	Mother	M of X = mother of X
H	Husband	H of X = husband of X
W	Wife	W of X = wife of X
S	Son	S of X = son of X
D	Daughter	D of X = daughter of X
B	Brother	B of X = brother of X
Z	Sister	Z of X = sister of X
GP	Grand‑parent	GP of X = either paternal/maternal grand‑parent
GC	Grand‑child	GC of X = grand‑child of X
Unc	Uncle	Unc of X = brother of X’s parent
Aunt	Aunt	Aunt of X = sister of X’s parent
Cousin	Cousin	Child of X’s uncle/aunt
In‑law	Rel‑in‑law	Spouse’s parent, sibling, etc. (e.g., MIL = mother‑in‑law)
Step‑	Step‑relation	From remarriage (step‑father, step‑sister)
Half‑	Half‑relation	Sharing only one parent (half‑brother)

Mnemonic for core symbols: “F M H W S D B Z” – pronounce as “Fem‑hw‑s‑d‑b‑z” (think of “Fem‑hw‑s‑dz”) to recall Father, Mother, Husband, Wife, Son, Daughter, Brother, Sister in that order.

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3. BUILDING A FAMILY TREE – STEP‑BY‑STEP METHOD

1. Identify the “Reference Person” (the person about whom the question asks). Mark him/her with a circle (or a star).
2. List all given statements and convert each into a directional arrow using the symbols above.

• E.g., “A is the brother of B” → A → B (B’s brother).
• If gender is unknown, keep the arrow but note “? ” for gender.

1. Place generations vertically:

• Older generations above, younger below.
• Same generation side‑by‑side (siblings, cousins).

1. Use solid lines for blood relations, dashed lines for marital relations.
2. Check for consistency: every person should have at most one father and one mother (unless step‑/adoption is explicitly mentioned).
3. Answer the query by tracing the required path on the diagram.

Quick‑draw tip: Use different coloured pens (or mental colour‑coding):

• Red = blood line (parent‑child)
• Blue = marriage line
• Green = sibling line

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4. TYPES OF RELATIONSHIP QUESTIONS

Type	Typical Wording	Solving Strategy
Direct Statement	“If X is the mother of Y, who is Z to Y?”	Convert statement to symbol, locate reference, answer directly.
Chain/Sequence	“A is the father of B. B is the sister of C. C is the husband of D. What is A to D?”	Build a linear chain of arrows, follow from start to end.
Puzzle/Multiple Clues	Five persons, each with a profession & relation clues. Determine who is who.	Create a tabular grid (persons vs. attributes) and eliminate options using each clue.
Blood‑Relation Only	No marriage clues, only parent/child/sibling.	Focus on generation gaps and sibling grouping.
Mixed (Blood + In‑law)	Includes spouse’s relatives.	Treat in‑law as a one‑step marital link then continue blood links.
Conditional (“If … then …”)	“If P is not the brother of Q, then …”	Use negation to eliminate possibilities; often leads to a unique solution.

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5. KEY FORMULAS & SHORTCUTS

Concept	Formula / Shortcut	Explanation
Generation Gap	Number of “parent‑child” links =	Gen₁ – Gen₂		Count arrows of type F/M (or S/D) between two persons.
Sibling Relationship	Same parents → Same generation gap = 0 and share at least one parent	If two persons have identical father or identical mother, they are siblings (full or half).
Cousin Relationship	Generation gap = 0 and parents are siblings	Check if the parents of the two persons are brothers/sisters.
Uncle/Aunt	Generation gap = 1 and parent’s sibling	Person is one generation above; check if they are sibling of any parent.
Grand‑parent/Grand‑child	Generation gap = 2 (up or down)	Two parent‑child links in same direction.
In‑law	Add one marital link to any blood relation	E.g., Father‑in‑law = Father of spouse → F + H/W (depending on gender).
Step‑relation	Ignore biological link, treat as if created by remarriage	Step‑father = Husband of one’s mother (not biological father).
Half‑relation	Share exactly one parent	Half‑brother = same mother or same father, but not both.

Mnemonic for generation gaps: “GAP – Generations Apart = Parent‑Child Links” – just count the “F/M” or “S/D” arrows.

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6. COMMON PITFALLS & HOW TO AVOID THEM

Pitfall	Why it Happens	Remedy
Assuming gender from names	Names like “Alex”, “Sam” can be either.	Never infer gender unless explicitly given (e.g., “He”, “She”, “Mr./Ms.”).
Mixing maternal & paternal sides	Forgetting that a person has two separate lineages.	Keep two columns in your rough sketch: Paternal (father’s side) and Maternal (mother’s side).
Over‑counting steps	Counting a marital link as a generation.	Remember: marital link does NOT change generation – it stays on the same horizontal line.
Ignoring “step”/“half” qualifiers	Treating step‑brother as full brother.	Look for qualifiers: step‑, half‑, adopt‑. Adjust the parent link accordingly.
Missing hidden relations (e.g., “X is the only child of Y” → implies no siblings).	Overlooking restrictive statements.	Translate every qualifier into a constraint (e.g., “only child” → no siblings).
Circular diagrams	Drawing a loop that violates biological rules (person as own ancestor).	After each addition, verify no person appears both above and below themselves.
Time pressure	Spending too long on elaborate drawings.	Use the symbol‑arrow method on rough paper; keep the sketch minimal – only what’s needed for the query.

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7. MNEMONICS FOR QUICK RECALL

1. “FAMILY” – Father, Aunt, Mother, In‑law, Leaf (child), Youth (descendant) – helps recall immediate family.
2. “SIBLING” – Same Internally Born Linking In Needy Groups – reminds you siblings share at least one parent.
3. “UNCLE” – Uncle = Nephew’s Child’s Loving Elder – think of uncle as parent’s brother. 4. “COUSIN” – Cousin = One Uncle’s Son/ Inlaw’s Niece – highlights the parent‑sibling link.
4. “IN‑LAW” – In‑law = In Needs A Legal Way – reminds you it’s via marriage only.

Use them while reading the question: Spot the keyword (e.g., “uncle”) → instantly recall the corresponding diagram pattern.

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8. SAMPLE QUESTIONS WITH SOLUTIONS (ILLUSTRATIVE)

Example 1 – Direct Statement

Q: If Rani is the daughter of Mohan, and Mohan is the brother of Sita, what is Sita to Rani?

Solution:

• Rani → D (daughter) of Mohan.
• Mohan → B (brother) of Sita.
• Draw: Sita –[B]→ Mohan –[D←] Rani.
• Sita is parent’s sibling → Aunt (father’s sister).

Answer: Aunt (paternal).

Example 2 – Chain

Q: A is the father of B. B is the sister of C. C is the husband of D. What is A to D?

Solution:

1. A –[F]→ B
2. B –[Z]→ C (sister)
3. C –[H]→ D (husband)

Now trace from A to D:

• A → (father) B → (sister) C → (husband) D.
• A is father of B, B is sister of C → A is also father of C (since sister shares father).
• C is husband of D → A is father‑in‑law of D.

Answer: Father‑in‑law.

Example 3 – Puzzle (5 persons) Clues:

1. P and Q are married.
2. R is the son of P.
3. S is the sister of Q.
4. T is the father‑in‑law of S.
5. U is the brother of R.

Question: How is U related to T?

Solution (grid method):

Person	Spouse	Parent	Children	Siblings
P	Q	–	R, U	–
Q	P	–	–	S
R	–	P	–	U
S	–	–	–	Q
T	–	–	–	– (father‑in‑law of S)
U	–	P	–	R

From clue 4: T is father‑in‑law of S → T is father of S’s spouse.

S’s spouse? Not given directly, but S is sister of Q → Q’s sibling.

Since P and Q are married, Q’s spouse is P. Therefore S’s spouse could be P? No, S is sister of Q, not married to P (unless incest). So we need another person: The only remaining unmarried person is T? Wait, T is father‑in‑law of S → T must be parent of S’s husband.

We don’t know S’s husband; could be someone not in list (maybe outside). But we only need relation of U to T.

U is son of P (from clue 2 & 5).

P is married to Q.

Q is sibling of S.

Thus, P is brother‑in‑law of S (since P married to Q, who is S’s sibling).

If P is brother‑in‑law of S, then father of P is father‑in‑law of S.

But we already have T as father‑in‑law of S → T = father of P.

Therefore, U (son of P) is grand‑son of T.

Answer: U is the grand‑son of T.

(Explain that sometimes you need to infer missing spouse; if not listed, treat as external.)

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9. QUICK‑REFERENCE TABLE – RELATIONSHIP CALCULATOR

From → To	Blood Link (steps)	Marital Link (if any)	Result
Father → Child	1 (F)	–	Father
Mother → Child	1 (M)	–	Mother
Husband → Wife	–	1 (H/W)	Husband/Wife
Brother → Sister	0 (same gen) + share parent	–	Brother/Sister
Uncle → Nephew/Niece	1 (up to parent) + 1 (down via sibling)	–	Uncle/Aunt
Grand‑parent → Grand‑child	2 (up/down)	–	Grand‑parent/Grand‑child
Cousin → Cousin	0 (same gen) + parents are siblings	–	Cousin
Father‑in‑law → Son‑in‑law	0 (marital) + 1 (father)	1 (marital)	Father‑in‑law
Mother‑in‑law → Daughter‑in‑law	0 + 1 (mother)	1 (marital)	Mother‑in‑law
Step‑father → Step‑child	0 (marital) + 1 (father)	1 (marital)	Step‑father
Half‑brother → Half‑brother	0 (same gen) + share exactly one parent	–	Half‑brother

How to use: Identify the minimum number of steps (blood + marital) and the type of each step; then read off the relationship from the table.

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10. PRACTICE TIPS (EXAM‑DAY)

1. Spend ≤ 45 seconds on each relationship question. If you can’t settle, move on and return if time permits.
2. Mark the reference person with a star; everything else radiates from it.
3. Use shorthand symbols on the rough sheet (F, M, H, W, S, D, B, Z). Write them above the arrow to avoid confusion.
4. Check gender consistency after each step – if you hit a contradiction, re‑evaluate the earlier assumption (often a missed “step/half”).
5. Eliminate options in MCQs by testing each answer against the diagram – the one that fits all clues is correct.
6. Stay calm with negatives (“not the brother”). Convert them to a positive restriction (e.g., “X cannot be brother of Y” → X must be either sister, cousin, etc.).

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11. FINAL RECAP – ONE‑PAGE CHEAT SHEET (Copy‑Paste for Revision)

RELATIONSHIP QUICK GUIDE

Symbols: F=Father M=Mother H=Husband W=Wife
S=Son D=Daughter B=Brother Z=Sister
GP=Grand‑parent GC=Grand‑child Unc=Uncle Aunt=Aunt
Cousin = child of uncle/aunt
In‑law = add one marital step
Step‑ = from remarriage
Half‑ = share only one parent

Generation Gap = count F/M (or S/D) arrows.
0 gap → same generation (siblings, cousins, spouses)
1 gap → parent/child or uncle/niece, aunt/nephew
2 gap → grand‑parent/grand‑child

Mnemonic for core: “F M H W S D B Z” → “Fem‑hw‑s‑d‑b‑z”
Mnemonic for gaps: “GAP = Generations Apart = Parent‑Child Links”

Solving Steps:
Identify reference person (circle/star).
Convert each statement to arrow using symbols.
Draw blood lines (solid) & marital lines (dashed).
Keep generations vertical; siblings side‑by‑side.
Answer by tracing required path.

Common Pitfalls:
Assuming gender from names → avoid.
Forgetting two lineages (maternal/paternal) → split columns.
Counting marital link as generation → remember: no gap change.
Missing “step/half/only child” qualifiers → note constraints.
Circular impossible loops → check after each addition.

Key Formulas:
Siblings: same parents (gap 0 + share ≥1 parent).
Cousins: gap 0 + parents are siblings.
Uncle/Aunt: gap 1 + parent’s sibling.
Grand‑parent/Grand‑child: gap 2 (straight line).
In‑law: blood relation + one marital link.
Step: treat as if created by remarriage (ignore biology).
Half: share exactly one parent.

Practice: 1–2 mins per Q, use symbols, check gender, eliminate options.

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You now have a compact, exam‑ready toolkit for all blood‑relation and family‑tree questions.

Revise the tables, run through a few practice puzzles, and you’ll convert relationship problems into quick scoring opportunities. Good luck!