Verbal Reasoning - Blood Relation Test - Discussion

Let's break down the statement:

"He is the son of the daughter of the father of my uncle."

"Father of my uncle" - This refers to the grandfather.
"Daughter of the father of my uncle" - This is the father's sister, which means the girl's father's sister.
"Son of the daughter of the father of my uncle" - This is the son of the girl's father's sister.

So, the boy is girl's cousin.

I think the boy is a cousin of the girl.

@All

Here if it's mentioned the Girl's mother is the only daughter of her father so that we could get brother as the answer. Here the original answer would be data insufficient or cannot be determined.

So, the boy's mother is the sister of the girl. Therefore, the boy is the nephew of the girl.

Yes, the answer is brother or cousin.

According to me, The answer should be Cousin.

According to me, Both cousin and brother are correct.

Through final conclusion, you will get to know that,

The son can be either cousin or brother of the girl, as a cousin is not in the given option it will be the brother of the girl.

Also, the relation between the girl and uncle, specifies that she is not the daughter of the uncle hence boy can't be a cousin of the girl.

@All.
went deeper to solve this one.
Firstly,
Step-by-step Breakdown:
"My uncle"→ Could be father's brother or mother's brother.

"Father of my uncle"→ That’s your grandfather (on either maternal or paternal side).

"Daughter of the father of my uncle"
→ That means: daughter of my grandfather
→ She could be My mother OR my aunt (if grandfather had multiple children)

"Son of the daughter of the father of my uncle"
→ That’s: son of my mother → my brother
OR
→ son of my aunt → my cousin.

So, what’s the correct interpretation?
The girl is not saying "my mother", but is going indirectly through: Daughter of the father of my uncle

Which could refer to:

Her mother, if her mother is the daughter in question

Her aunt, if her aunt is the daughter in question

But the girl does not specify that the daughter is her mother, so it could be any daughter of the grandfather.

Thus, the most general and safest assumption is that the daughter is the girl’s aunt, making the boy her cousin.

So, the Final Answer: Cousin.

@All.

Here, you can understand it properly.

In this type of question (son of the daughter of the father of my uncle) reverse the chain

i.e. solve it this way.

Father of uncle.
Daughter of the father of uncle.

Son of the daughter of the father of uncle.

So
1) Father of an uncle (dad)
2) Daughter of the father of uncle.
3) Son of the Mom.
(Son of the mummy is brother).

Hope you understand.