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Question

If A is the father of B, who is the father of C, and D is the only son of C and C's wife F, then how is D related to A?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
Great-grandson

Family Relationship Analysis

This problem requires tracing a family lineage to determine the relationship between two individuals, D and A.

Tracing the Generations

We can establish the generational links step-by-step:

  1. A is the father of B. This means B is one generation below A.
  2. B is the father of C. This means C is one generation below B.
  3. Combining the first two points, A is the father of B, who is the father of C. Thus, A is the grandfather of C. C is two generations below A.
  4. D is the son of C. This means D is one generation below C.
  5. Since A is the grandfather of C, and C is the father of D, A is the father of the father of the father of D. Therefore, A is the great-grandfather of D.

Determining D's Relation to A

The question asks for D's relationship relative to A.

  • We established that A is the great-grandfather of D.
  • Conversely, D is the descendant in the male line, specifically the son of C (who is the son of B, who is the son of A).
  • Therefore, D is the great-grandson of A.
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Important Questions from Family Tree Problems

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