Blood-Relations – 60-Minute Revision Sheet for RRB
1. Golden Rule (Always Draw)
- GENOGRAM: □ = Male, ○ = Female, ↔ = Couple, | = Parent–Child
- ONE-LINE AGE RULE: Older generation ↑, Same generation →, Younger generation ↓
- NEVER ASSUME GENDER FROM NAME – wait for clue.
2. Codewords → Instant Relations
| Code | Full Form | Quick Note |
|---|
| M | Mother | Always female |
| F | Father | Always male |
| B | Brother | Male sibling |
| S | Sister | Female sibling |
| H | Husband | Male spouse |
| W | Wife | Female spouse |
| C | Child | Son/Daughter |
| P | Parent | M/F |
Combine: MFS = Mother’s Father’s Son → Uncle.
| Relation asked | Formula in symbols | Trick |
|---|
| Mother’s/Father’s only son | Self | “Only” → remove sibling |
| Son of my grandfather’s only son | Self | Work inside-out |
| Wife of my father’s father | Grand-mother | Two fathers cancel |
| Brother of my mother’s only child | Self | “only child” = me |
4. Generation Ladder
- +2 Great-grandparents
- +1 Grand-parents / Uncle / Aunt
- 0 Self, Siblings, Cousins
- -1 Children
- -2 Grand-children
5. Gender-Checker Tricks
- “Only son” → must be male.
- “Spouse of X” → opposite gender of X.
- “X is father of Y” → X male, Y can be any.
- No info? → Keep both options (M/F) till last clue.
6. Mnemonics
- FBS = “Father’s Brother Son” → Cousin brother.
- MBD = “Mother’s Brother Daughter” → Cousin sister.
- “FUCHSIA” – F-Father, U-Uncle, C-Cousin, H-Husband … list top relations quickly.
7. 30-Sec Elimination Plan
- Read Q twice → note gender & generation.
- Draw 3-generation tree (max).
- Put fixed clues first; leave blanks for unknown.
- Answer always in English word, NOT code.
- No negative marking? Attempt even if 50 % sure.
8. Table of Common Twists
| Statement | Hidden meaning |
|---|
| “Her mother is my mother’s only daughter” | Speaker is the girl’s mother |
| “The man is the son of my wife’s husband” | My son |
| “The lady is the daughter of my mother’s husband” | Sister (step-sister included) |
9. Rapid-Fire Q&A
Q1: Pointing to a man, Rita said, “His only brother is the father of my daughter.” How is Rita related to that man?
Rita is the **wife** of the man (man’s only brother = Rita’s husband).Q2: X introduces Y: “His mother’s brother is the father of my son.” How is Y related to X?
Y is **nephew** of X (X is Y’s maternal uncle).Q3: A is B’s sister. C is B’s mother. D is C’s father. E is D’s mother. What is A to D?
A is **grand-daughter** of D.10. Last-Day Quick Facts
- Paternal = Father’s side; Maternal = Mother’s side.
- Cousins are always same generation.
- In-laws appear only after marriage in tree.
- Double cousins = Father’s sibling + Mother’s sibling children (rarely asked).
- No relation = mark “None of these” boldly.
11. One-Minute Recall Card
- Draw → 2. Code → 3. Generation → 4. Gender → 5. Answer.
Done! Attempt, Revise, Repeat.
BETA
