A programmer had a problem. He decided to use Java. He now has a ProblemFactory.

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Q: Why was the mole of oxygen molecules excited when he walked out of the singles bar? A: He got Avogadro's number!

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Q: 0 is false and 1 is true, right? A: 1.

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Q: Why did the computer go to the dentist? A: Because it had Bluetooth.

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Knock-knock. Who's there? To. To who? No, to whom.

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