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Puzzle | Joint family of seven persons (L, M, N, O, P, Q, and R)

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In a joint family of seven persons L, M, N, O, P, Q, and R, two are married couples. R is a housewife and her husband is a lawyer. N is the wife of M, L is an engineer and is the granddaughter of R, and O is the father-in-law of N, a doctor, and father of P, a professor. P and M are siblings of the same gender. Q is L’s brother and M’s son. How is L related to O and how many males are there in the family. 

Solution:

  • The family consists of seven persons, namely L, M, N, O, P, Q, and R.
  • Two married couples are there in the family.
  • R is a housewife and her husband is a lawyer.
  • The gender of R is female, and she is married to a lawyer. They both are a married couple.
  • N is the wife of M. The gender of N is female and the gender of M is male.
  • N and M are the second married couple.
  • L is an engineer and is the granddaughter of R. The gender of L is female, and she is the granddaughter of R.
  • Grandfather of L is a lawyer, and he is married to R.
  • O is the father-in-law of N. The gender of O is male and N is the daughter-in-law of O. N is a doctor.
  • O is the father of P and P is a professor. P and M are siblings.
  • From this, we can infer that P and M are brothers.
  • The father of P and M is O, and M is married to N.
  • Q is L’s brother and M’s son. Q and L are siblings, and they are children of N and M.
  • L is an engineer, and she is the granddaughter of R.
  • It implies Q is the grandson of R, M is the son of R and R is married to O.
  • The other married couple is O and R. Their children are M and P.
  • M is married to N and their children are L and Q.

The family tree is shown in the below figure:

  • L is the granddaughter of O and O is the grandfather of L.
  • There are four males and three females in the family. They are as follows:
  1. O : Male
  2. P : Male
  3. M : Male
  4. Q : Male
  5. R : Female
  6. N : Female
  7. L : Female

Last Updated : 18 Jan, 2023
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