Page 5 – Reasoning (Blood Relation)
Problem • Step-wise Solution • Diagram Method
Q1. A is father of B, B is sister of C. What is A to C?
Step 1: Identify relations
A → father of B
B → sister of C
Step 2: Understand sibling relation
B and C have same parents
Step 3: Connect A to C
A is also father of C
Answer: Father
Trick: Same siblings → same parents
Q2. A is mother of B, B is brother of C. What is A to C?
Step 1: A → mother of B
Step 2: B and C are siblings
Step 3: A is parent of both
Answer: Mother
Trick: Brother/sister → same parent
Q3. A is son of B, B is daughter of C. What is A to C?
Step 1: A → child of B
Step 2: B → child of C
Step 3: A is child of C's child
Answer: Grandson
Trick: Two generations → grand relation
Q4. A is brother of B, B is mother of C. What is A to C?
Step 1: A and B are siblings
Step 2: B is parent of C
Step 3: A is sibling of parent
Answer: Uncle
Trick: Parent's brother = uncle
Q5. A is sister of B, B is father of C. What is A to C?
Step 1: A and B are siblings
Step 2: B is parent of C
Step 3: A is sibling of parent
Answer: Aunt
Trick: Parent's sister = aunt
Diagram Method
Always draw simple tree:
Parent → Children
Sibling → Same level
Grand → One level above
Key Words
- Father/Mother → Parent
- Brother/Sister → Same level
- Son/Daughter → Below level
- Grandfather → Two levels above
Shortcut Tip
Always draw diagram → never solve mentally
Final Tip
Identify generation first → relation becomes easy
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