self Maths Puzzle

A man on a park bench is looking at a small portrait. You ask him, "Who is that in the picture?"

The man says, "Brothers and sisters, I have none, but that man's father, is my father's son."

Can you tell what person is in the picture?

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self Other Question

This is a famous puzzle based on the show "Let's make a deal".

The host, Monty Hall, offers you a choice of three doors. Behind one is a sports car, but behind the other two are goats.

After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?
At a restaurant downtown, Mr. Red, Mr. Blue, and Mr. White meet for lunch. Under their coats
they are wearing either a red, blue, or white shirt.

Mr. Blue says, "Hey, did you notice we are all wearing different colored shirts from our names?" The man
wearing the white shirt says, "Wow, Mr. Blue, that's right!"

Can you tell who is wearing what color shirt?