Mathematical Reasoning - Blood Relation

11. Pointing to a photograph Raveena says, ‘He is the son of the only son of my grandfather.’ How is the man in the photograph related to Raveena?

  • Option : B
  • Explanation : The man in the photograph is the son of the only son of Raveena’s grandfather. Thus, the man is the son of Raveena’s father. Hence, he is the brother of Raveena.
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12. Vinita, who is the sister−in−law of Amit, is the daughter−in−law of Kamni. Deepak is the father of Sandy who is the only brother of Amit. How is Kalyani related to Ashok?

  • Option : D
  • Explanation : blood relations
    Amit is the only brother of Sandy, and Vinita is the sister- in-law of Amit. Hence, Vinita is the wife of Sandy. Kamni is the mother-in-law of Vinita. Kamni is the mother of Amit.
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14. X and Y are siblings. C and D are wife and husband, respectively; X is the only son of C. F is the sister of D. How is Y related to F?

  • Option : A
  • Explanation : blood relations
    As X is the only son of C (and D), Y is the female. Looking at the family tree, we can say that Y is the niece of F.
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