Solving the Relationship Puzzle: Woman's Relation to the Man

This question involves a relationship puzzle based on a statement made by a woman introducing a man to her husband. Let's break down the statement step by step to determine the relationship.

Deconstructing the Statement

The core of the puzzle lies in the woman's statement: "His brother's father is the only son of my grandfather."

Step 1: Understanding "His brother's father"

• Consider the man mentioned.
• "His brother" refers to the man's sibling.
• The father of the man's brother is simply the man's father.

Step 2: Understanding "my grandfather"

• This refers to the woman's grandfather (her father's father or her mother's father).

Step 3: Understanding "the only son of my grandfather"

• If a grandfather has only one son, that son must be the woman's father.

Step 4: Connecting the parts

• From Step 1, we know the first part of the statement refers to the man's father.
• From Step 3, we know the second part of the statement refers to the woman's father.
• Therefore, the statement simplifies to: "The man's father is the woman's father."

Determining the Relationship

If the man's father and the woman's father are the same person, it means the man and the woman share the same father.

People who share the same father (and usually the same mother) are siblings.

Since the question asks how the woman is related to this man, and they share the same father, the woman is the man's sister.

Final Answer Analysis

Based on the logical breakdown of the statement:

• The man's father = The woman's father.
• This implies they are brother and sister.
• Therefore, the woman is the man's sister.