Puzzle - Blood Relation - GeeksforGeeks

Blood relation:

Blood relation often relates to a family’s hierarchical structure to the hierarchical structure of a family, such as grandparents and offspring, etc. There will be various ties between the family members of various generations. By arranging the numerous ties, the full family tree must be constructed to answer questions about blood relations.

THREE GENERATIONS

Typical relationships in blood relations:

• Father’s or Mother’s father = Grandfather
• Father’s or Mother’s mother = Grandmother
• Father’s or Mother’s brother = Uncle
• Father’s or Mother’s sister = Aunt
• Son’s wife = Daughter-in-law
• Daughter’s Husband = Son-in-law
• Sister’s Husband = Brother-in-law
• Brother’s wife = Sister-in-law
• Husband’s or wife’s sister = Sister-in-law
• Husband’s or wife’s Brother Brother-in-law
• Father’s or Mother’s son = Brother
• Father’s or Mother’s daughter = Sister
• Brother’s or Sister’s Son = Nephew
• Brother’s or Sister’s Daughter = Niece
• Son or daughter of an uncle or an aunt = Cousin

Symbols used in blood relations:

In this chapter, a few common symbols represent connections between family members to create a blood relation tree. To quickly and properly construct the family tree, you can develop your symbol or use one of the ones shown in the figure below.

Symbols used in blood relation

There are three types of blood-related questions seen in exams:

• Family tree or chart: It uses a family tree or family chart to show the connection between two different family members.
• Coded relationship: Specific characters and symbols are employed when establishing a relationship between people. Numerous symbols and characters, including #, $, @, *,  >, !, etc are used. Further, you will three types of questions in this section:
  • Find a relationship
  • Create code by using the given relationship
  • Insert the correct symbol
• Pointing: In these kinds of questions, someone introduces or points to any member by visual or verbal pointing.

The illustrations below will help you understand these three types of questions. 

Points to remember while solving the questions of blood relation:

• Always strive to create a family tree with symbols that are simple for you to comprehend. After then, try to respond to the query.
• Identifying the males and females in the question is the first step in building a family tree. Next, try to place each member in an appropriate spot on the tree or chart.

Where are Blood Relation puzzles used?

• Railway Recruitment Board Assistant Loco Pilot (ALP)
• SSC CGL
• SSC CHSL
• SSC GD
• IBPS PO
• IBPS Clerk
• IBPS SO
• SBI PO
• SBI Clerk
• SBI SO

Illustrations:

Q1. A is B’s father’s nephew, and C is B’s cousin but not the brother of A. How is C related to A?
a) Cousin
b) Sister
c) Aunt
d) Niece

Ans. A is B’s father’s nephew means A is the son of B’s father’s brother i.e. A is the cousin of B. C is also B’s cousin. So, C must be the real brother or sister of A. But C is not the brother of A means C must be the sister of A. 

Family tree of Q1

Hence, option (b) is correct.

Q2. If Sumitra is Gyanendra’s father’s mother’s Husband’s sister. Then how is Sumitra related to Gyanendra?
a) Sister
b) Aunt
c) Cousin
d) Grandaunt

Ans. Gyanendra’s father’s mother is Gyanendra’s grandmother, his grandmother’s husband is his grandfather, and finally, his grandfather’s sister is his grandaunt. So, Sumitra is Gyanendra’s grandaunt.

Family tree of Q2

Hence, option (d) is correct.

Q3. If A @ B means A is the father of B, A # B means A is the mother of B and A $ B means A is the husband of B. Then:

A} If P @ Q # R $ T. How is P related to T?
a)  Grandfather
b) Mother
c) Grandfather-in-law
d) Sister

B} Find the correct code for: C is the grandson of A?
a) C # B # A $ D
b) C # D # B# A
c) C # B $ A @ D
d) A @ B @ C $ D

C} Insert the correct symbol in space of the question mark: M @ N? P if M is the grandfather of P?
a) @
b)  #
c) # or @
d) $

Ans.

A} As P @ Q # R $ T, in which P @ Q means P is the father of Q, Q # R means Q is the mother of R, and R $ T means R is the husband of B. Then, by following the below image, you can understand that P is the grandfather-in-law of T.
Hence, option (c) is correct.

Family tree of Q3{A}

B} To identify the correct code, you have to go through each option.
By option (a), C # B # A $ D, C # B means that C is the mother of B. This option is incorrect, as we want C as a grandson, which is a male, but from option (a), we learned that C is a female.
By option (b), C # D # B# A, C # D means C is the mother of D. This option is also incorrect, as we want C as a grandson, which is a male, but from option (b), we learned that C is a female.
By option (c), C # B $ A @ D, C # B means that C is the mother of B. This option is incorrect, as we want C as a grandson, which is a male, but from option (a), we learned that C is a female.
By option (d), A @ B means A is the father of B, B @ C means B is the father of C, and C @ D means C is the husband of D. Now that A is the father of B and B is the father of C, it implies that A is the grandfather of C or that C is the grandson of A.
Hence, option (d) is correct.

Family tree of Q3{B}

C} For inserting the correct code, you can do it by going through each option, or you can use codes and a statement to answer the question.
When we say that M is the grandfather of P, we mean that M is the father of P.
M @ N implies that M is the father of N. If we want M to be the grandfather of P, then N should be the father of P. So N @ P means N is the father of P.
Hence, option (a) is correct.

Family tree of Q3{C}

Q4. Pointing to Mamta, Kishori said, “The son of her only brother is the brother of my wife”. How is Mamta related to Kishori’s wife?
a) Mother-in-law
b) Sister-in-law
c) Aunt
d) None of these

Ans. Brother of my wife, my brother-in-law; son of Mamta’s brother is the brother-in-law of Kishori. So, Mamta’s brother is Kishori’s father-in-law i.e. Mamta is the sister of Kishori’s father-in-law.

Family tree of Q4

Hence, option (c) is correct.

Q5. Showing Priya, Raju said, “Her mother’s only daughter is my daughter.” How is Raju related to Priya?
a) Uncle
b) Brother
c) Son
d) Father

Ans. Priya’s mother’s only daughter is Priya, and Priya is the daughter of Raju, so Raju is the father of Priya. And further you can understand this by making a family tree according to the question, which you can see in given below image:

Family tree of Q5

Hence, option (d) is correct.