Kenneth is brother of Robert. Lisa is sister of Kenneth. Mark is brother of Laura. Laura is daughter of Robert. Richard is father of Lisa. Who is the uncle of Mark?



Step by Step Explanation:
  1. Kenneth is the brother of Robert.
  2. Lisa is the sister of Kenneth. So Lisa is also the sister of Robert.
  3. Mark is the brother of Laura.
  4. Laura is the daughter of Robert. So Robert is also the father of Mark
  5. Richard is the father of Lisa. So Richard is also the father of Kenneth and Robert.
  6. Since Lisa is female, she cannot be uncle of Mark, therefore only possibility is Kenneth.
  7. Therefore, Kenneth is the uncle of Mark.

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