Recently, a logical question about family relationships has sparked heated discussions on major social platforms! The title describes the relationship between the passengers on an airplane: there are 3 fathers and sons, 3 mothers and sons, and 3 brothers and sisters. This deceptively simple math problem resulted in 99% of the participants giving the wrong answer!

Common Wrong Answers:

1. Direct addition: 3 3 3 = 9 people (wrong) 2. Consider partial recurrence: 6-7 people (still wrong)3. Ignoring key family relationships (completely detached)

Correct Answer Analysis:

Only a minimum of 5 people is required! Specific Composition:1.

Grandfather (as father)2. Father (grandfather's son, also father)3. Mother4. Son 5. daughter

So satisfied:

• 3 fathers and sons: grandfather, father, son

• Mother and 3 children: mother, son, daughter

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