What four periodic elements, when...

Riddle: Shiny like a silver, denser than lead, pricier than gold, could stop a bullet, if I wanted to. What am I?

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Answer: Osmium

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Riddle: What’s the loneliest of all physics concepts?

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Answer: The singularity

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Riddle: Adivina quién soy; Cuando voy, vengo, Y cuando vengo, voy.

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Answer: El cangrejo

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Riddle: A huge mythical animal said to resemble a whale.

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Answer: Leviathan.

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Riddle: A man is locked in a room with a serial killer. The killer says that he will allow the man to escape if he can beat him in the serial killer's favorite game. If the man loses, the serial killer will kill him. The rules of the game are as follows: 1. Each man must take turns placing a coin on a perfectly round table. 2. The coins must lay flat. 3. The coins cannot overlap each other. 4. The coins cannot hang off the edge of the table at all. 5. The first man to run out of room to place a coin on the table loses. The serial killer is very confident in his ability to win at this game, so he lets the man go first. What can the man do to guarantee that he wins the game?

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Answer: The man must first place a coin in the center of the table. He then must replicate every move the serial killer makes on the opposite side of the table. Eventually the serial killer will run out of places to place a coin and the man will win.

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Riddle: What are 10 things you can always count on?

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Answer: Your fingers.

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