Blood Relations

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Theory

Questions on Blood Relations are frequently asked in entrance exams. These questions appear tricky, but can be solved easily if one is careful in tracing the relations between the different people in question.

Theory

Relations:

Theory

Generations:

Tip

Maternal is related to mother and paternal is related to father. Remember M-M.

Tip

If the question asked is “How is A related to B?”, then the gender of person A must be known to answer the question.

Tip

If X is an uncle/aunt of Y, then Y is the nephew of X if Y is male and niece if female.

Tip

There exists no relation like cousin-brother, cousin-sister etc.

Tip

Cousin is a term used for both male and female.

Solved Example

Pointing to a boy, Amit said “This boy is the son of the only child of my mother”. How is Amit’s wife related to the boy?

a) mother
b) sister
c) aunt
d) grandmother

Explanation:
Amit’s mother’s only child is Amit. So, the boy is the son of Amit and Amit’s wife is the boy’s mother.

Solved Example

Ravi is the son of Kavya. Kavya and Ramya are sisters. Shobha is the mother of Ramya. Santosh is Shobha’s son. Which of the following statements is true?

A. Ravi and Santosh are cousins
B. Santosh is the maternal uncle of Ravi
C. Ramya is the maternal grandmother of Ravi
D. Kavya is the sister of Santosh

Explanation:
Since Santosh is the son of Kavya and Ramya’s mother, Kavya, Ramya and Santosh are siblings. Ravi is the son of Kavya. So, Santosh is the maternal uncle of Ravi. Shobha is Kavya’s mother. So, she is the grandmother of Ravi.
From the statements, we can see that only B and D are correct.

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