In a family of seven members—P, Q, R, S, T, U, and V—representing three generations, there… — State PSC Exam

In a family of seven members— $P, Q, R, S, T, U,$ and $V$ —representing three generations, there are two married couples. The relationships among the family members are specified below:

• $R$ is the mother of $T$ and the mother-in-law of $U$ .
• $P$ is the father-in-law of $U$ and has only one son, $S$ .
• $U$ is married to $T$ .
• $Q$ and $V$ are siblings, both being children of $T$ .

Based on the given information, how is $S$ related to $V$ ?

Maternal uncleAnswer
B
Paternal uncle
C
Nephew
D
Brother

Answer

Maternal uncle

The correct answer is Maternal uncle because

P

and

R

are married and have two children:

S

(male, since he is the only son) and

T

(female).

T

is married to

U

and is the mother of

V

. Since

S

is the brother of

V

's mother (

T

S

V

's maternal uncle.

Step-by-Step Solution

Determine the first-generation couple and their children.

P

and

R

form a married couple in Generation 1.

R

is the mother of

T

and

P

is the father-in-law of

U

Since

R

is the mother of

T

and

P

is the father-in-law of

T

's spouse

U

P

and

R

are married.

Deduce the genders of

S

and

T

S

is male (son) and

T

is female (daughter).

The problem states that

P

has only one son, who is

S

. Because

T

is also a child of

P

and

R

T

must be female.

Determine the Generation 2 couple and Generation 3 children.

T

(female) is married to

U

(male). Their children are

Q

and

V

U

is married to

T

, making

T

the mother of

Q

and

V

Determine the relationship between

S

and

V

S

is the maternal uncle of

V

S

is the brother of

T

, and

T

is the mother of

V

. The brother of one's mother is a maternal uncle.

Key Concept

Blood relations gender deduction using uniqueness constraints

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Answer

Step-by-Step Solution

Key Concept

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