Here it is:
A man has 9 sons. Each son has a sister. How many people are in the family?continue reading …
Take a moment. Don’t rush. Let your brain consider the possibilities. It feels straightforward at first, doesn’t it? Nine sons, each with a sister… you might immediately start calculating.
Some people jump to: 9 sons + 9 sisters + 1 father = 19 people. But that’s where the trap lies.
The riddle never said each son had a different sister. It only said:continue reading …

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