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In a dark room, 3 blue hats and 2 green hats sit on a table. 3 people, 1 blind, enter the room. Each of the 3 people takes a hat random, without being able to see what colour they wear. The remaining 2 hats are taken out of the room.
The light is switched on and each person is asked to say whether they can guess the colour of the hat they are wearing.

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Ben has three daughters. Paul, a neighbour, asks how old they are. Ben replies as following.
– The product of their age is 36.
– The sum of their ages is equal to my house number.
Upon hearing this, Paul is still unable to determine the 3 daughter’s age.

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