Blood relations involve the analysis of information showing blood relationship among members of a family. In the questions, a chain of relationship is given in the form of information and based on this information relation between any two members of the chain is asked. Catch up SSC CGL notifications and latest updates
Candidates are supposed to be familiar with the knowledge of different relationship in a family such as father-mother, son-daughter, brother-sister, grandfather-grandmother, uncle-aunty, nephew-niece etc.
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Logical Reasoning in SSC CGL is one the most important for the candidates to prepare for the exam. Holding 50 marks-weightage in the exam, it must be studied well while preparing for SSC CGL 2021.
Example 1: P’s father’s Sister’s father is Q. How is Q related to P?
Solution – (a) Here P’s Father’s sister is P’s Aunt. Her father is P’s father’s father. Therefore, Q is the grandfather of P.
Example 2: Examine the following relationship among members of a family of 6 persons – A, B, C, D, E and F.
1. The number of males equals that of females.
2. A and E are sons of F.
3. D is the mother of two, one boy and one girl.
4. B is the son of A.
5. There is one married couple in the family at present.
Which one of the following inferences can be drawn from the above?
a). A, B and C are all females.
b). A is the husband of D.
c). D is the granddaughter of F.
d). E and F are children of D.
Solution – (b) It is clear that there are three males and three females in the family. Clearly, A, E and B are males. So, C, D and F are females. Also given that D is the mother of one boy and one girl. So, A and D form a couple having two children, namely B and C. Hence A is the husband of D.
U + V means U is the brother of V
W – X means W is the father of S
X Y means X is the sister of Y,
Y Z means Z is the mother of Y.
Which of the following means that N is the mother of O?
a). L + M / N *O
b). L – M * O / P
c). N / M * L / O
d). M + L / O * N
Solution – (d) M + L / O N means M is the brother of L and L is the sister of O and N is the mother of O.
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Some more tips:
Grandfather’s (daughter-in-law) = Mother
Father's son = Brother
Father's daughter = Sister
Grandfather’s son = Father / Uncle
Grandfather’s only son (Same in the Case of Grandmother) = Father
Some of the notations of the Diagrammatic representation of family relations
1. When M is male –
2. When N is female –
3. When M, N are husband and wife –
4. When, P, Q are siblings –
5. When A has only child B –
6. When A has two children B, C –
7. L uncle is uncle or aunt of M
These tips will help you to know the common errors in blood relation and how to avoid such errors by some basic knowledge of the family tree and its rules.
1. Identify the persons who are in the given information.
2. Identify who are male and who are female.
3. Determine the generations of family.
4. Identify the positions and generation of the family members and draw the diagram with relationships among family members using notations.
5. Once the diagram is filled you can solve the given question.
The easiest way to solve the problems based on Blood Relationships would be to draw a tree diagram as follows:
1. Pointing to a man, a lady told his father is her mother’s uncle. How it’s the man related to the lady?
Solution: Mother’s Uncle = Grandfather
Grandfather’s son = Uncle
The man is the uncle of the lady.
Example 1: Pointing to a man in a photograph, a man said to a woman, "His mother is the only daughter of your father". How is the woman related to the man in the photograph?
a) Sister b) Mother c) Wife d) Daughter e) None of these
In this type, relationships represented by codes and symbols like +, –, /, *. You have to analyze the required relation based on the given code. In this also you may need the diagrammatic representation of the problem to solve it. Use the same representation used in mixed-blood relations.
In the coding equation, better to solve the code from the last letter.
If P+Q means P is the husband of Q, P/Q means P is the sister of Q, P*Q means P is the son of Q. how is D related to A in D*B+C/A?
C/A – C is the sister of Q.
B+C/A – B is the brother in law of A (sister’s husband – brother in law.
D*B+C/A – D is the nephew of A (sister’s husband’s son means sister’s son i.e. nephew).
So, the answer is the Nephew.
Q1. Pointing to a lady in the photograph, Monika said, “Her son’s father is the son-in-law of my mother.” How is Monika related to the lady?
Q2. Anil introduces Akash as the son of the only brother of his father’s wife. How is Akash related to Anil?
Q3. Shikha told Aarushi, “The girl I met, yesterday at the beach was the youngest daughter of the brother-in-law of my friend’s mother.” How is the girl related to Shikha’s friend?
Q4. Pointing to a man on the stage, Natasha said, “He is the brother of the daughter of the wife of my husband.” How is the man on the stage related to Natasha?
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Q5. Pointing to a man in a photograph, Aarohi said, “His mother’s only daughter is my mother.” How is Aarohi related to that man?
Selecting the right books is very important for sure success in any exam. It reduces efforts. Selecting the best books to simplify your learning process and enhances your chances of doing best in the SSC CGL.
Here is the list of books that the candidate must refer for best results:
|Reasoning||Verbal- Non-Verbal Reasoning||R.S. Aggarwal|
|Reasoning||Analytical Reasoning||M K Pandey|
|Reasoning||Multi-Dimensional Reasoning e-book||Upkar Publication|
|Reasoning||Reasoning Ability Questions for SSC e-book||Upkar Publication|
|Reasoning||Practice Questions for Reasoning Ability||Disha Publication|
*The article might have information for the previous academic years, please refer the official website of the exam.