# Blood Relationship: Basic Concept & Shortcuts

Learn the basic concept of Blood Relationship which is considered to be one of the most important topics of logical reasoning section for any competitive exam like Bank and SSC Exams, Railway Exams, CSAT, Insurance Exams, etc. Here, you will get to know the shortcuts to quickly solve these types of problems with accuracy.
Updated: Jan 25, 2018 11:46 IST

Blood Relationship is considered to be one of the most important topics of logical reasoning section for any competitive exam. The students must have a sound knowledge of blood relations in order to solve these questions.

## Knowledge of some important relations:

The easiest way to solve the problems based on Blood Relationships would be to draw a tree diagram as follows:

## Here are few examples to understand the concept of Blood Relationships:

Example: P’s father’s Sister’s father is Q. How is Q related to P?

Here, P’s Father’s sister is P’s Aunt.

Her father is P’s father’s father.

Therefore, Q is grandfather of P.

Example: Examine the following relationship among members of a family of six persons - A, B, C, D, E and F:

• The number of males equals that of females.
• A and E are sons of F.
• D is the mother of two, one boy and one girl.
• B is the son of A.
• 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.

Answer: 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. So, option b) is correct.

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