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Question

Sultan said to Ramesh that "I am the grandfather of the only nephew of the only brother/sister of your brother's wife." What could be Ramesh's relationship with Sultan?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper PDF (31-Jan-2021) (Shift 1)
The correct answer is

Son

Relationship Breakdown: Step-by-Step Logic

To solve this relationship puzzle, we systematically break down the statement made by Sultan:

  • "your brother's wife": This refers to the wife of Ramesh's brother. Let's call her RBW.
  • "only brother/sister of your brother's wife": This refers to the single sibling of RBW. Let's call this sibling SBW.
  • "only nephew of [SBW]": A nephew is the son of one's sibling. Since SBW is RBW's sibling, and RBW is SBW's sibling, the nephew must be the son of RBW. Let's denote this nephew as N. Therefore, N is the son of RBW.

Grandfather Deduction

The core of the statement is: "Sultan is the grandfather of N".

  • Given that N is the son of RBW, Sultan being N's grandfather implies Sultan is the father of N's parents.
  • N's parents are RBW and Ramesh's brother (RB).
  • Thus, Sultan must be either the father of RBW or the father of RB.

Determining Ramesh's Relation

We evaluate the two possible relationships:

  • Scenario 1: Sultan is the father of RBW. This would make Sultan the father-in-law of Ramesh's brother. This relationship is not listed as an option.
  • Scenario 2: Sultan is the father of RB (Ramesh's brother). If Sultan is the father of Ramesh's brother, he is necessarily the father of Ramesh as well.

This scenario aligns with the options, concluding that Ramesh is Sultan's son.

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