Minimum Individuals in Room Riddle Solution
The question asks for the minimum number of people required in a room that contains exactly 3 fathers and 6 sons. An important condition is that "every father's son(s) and every son's father are present," implying a complete set of relationships within the group. To find the minimum number, we must maximize the overlap in roles, where one person can be both a father and a son.
Minimum Structure for 7 Individuals
The minimum number of individuals required is 7. This can be achieved with a structure spanning three generations:
- Individual 1: The Grandfather. (Serves as Father 1)
- Individual 2: Son 1 (son of Individual 1). (Serves as Son 1 and Father 2)
- Individual 3: Son 2 (son of Individual 1). (Serves as Son 2 and Father 3)
- Individual 4: Grandson 1 (son of Individual 2). (Serves as Son 3)
- Individual 5: Grandson 2 (son of Individual 2). (Serves as Son 4)
- Individual 6: Grandson 3 (son of Individual 3). (Serves as Son 5)
- Individual 7: Grandson 4 (son of Individual 3). (Serves as Son 6)
Verification of Conditions
Let's verify if this group of 7 people meets all the conditions:
- Total People: There are exactly 7 individuals.
- Fathers:
- Individual 1 (Grandfather) is a father.
- Individual 2 (Son 1) is a father.
- Individual 3 (Son 2) is a father.
- Sons:
- Individual 2 is a son (of Individual 1).
- Individual 3 is a son (of Individual 1).
- Individual 4 is a son (of Individual 2).
- Individual 5 is a son (of Individual 2).
- Individual 6 is a son (of Individual 3).
- Individual 7 is a son (of Individual 3).
All conditions are satisfied with 7 individuals, confirming this as the minimum number required.
Important Questions from Blood Relations (Notes)
- Pointing to a photograph Lata says, "He is the son of the only son of my grandfather."
How is the man in the photograph related to Lata ? - Introducing a man, a women said, "His wife is the only daughter of my father". How is that man related to the woman?
- In a family, D is the father of F and E only. D has one son. E is married to G. G is the son-in-law of P. G has one son H. K and J are the children of E. L is married to K. The total number of male members in the family is :
- There are six members A, B, C, D, E and F in a family. E is daughter of B and A is brother of B. C is father of A and D is brother of E. F is wife of C. Uncle of D is
- In a certain code language,
A + B means ‘A is the mother of B’
A - B means ‘A is the wife of B’
A × B means ‘A is the sister of B’
A ÷ B means ‘A is the father of B’
Based on the above, how is S related to P if ‘S - K ÷ T × V + P’?
