The trick lies in the phrase:
π βEach son has a sister.β
It does not say that each son has a different sister. All 9 sons could share the same sister.
So the family consists of:
π¨ 1 father
π¦ 9 sons
π§ 1 daughter (the sister shared by all the sons)
β
Total = 11 People
1 + 9 + 1 = 11
Simple, right? Yet thousands of people get it wrong because they focus on the numbers instead of the wording. π
π§© Why Our Brains Fall for These Tricks
Brain teasers like this exploit a common habit: we often make assumptions without realizing it.
When people read:
βEach son has a sisterβ
many automatically imagine:
π¦β‘οΈπ§
π¦β‘οΈπ§
π¦β‘οΈπ§
as if every son has his own unique sister.
But language doesnβt say that. It only tells us that every son has a sister, and that sister can be the same person for all of them.
This is a perfect example of how our minds fill in missing details automatically. π§ β‘
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