An astronomer, a physicist and a mathematician are on a train in Scotland. The astronomer looks out of the window, sees a black sheep standing in a field, and remarks, "How odd. Scottish sheep are black." "No, no, no!" says the physicist. "Only some Scottish sheep are black." The mathematician rolls his eyes at his companions' muddled thinking and says, "In Scotland, there is at least one field, containing at least one sheep, at least one side of which appears black from here."

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Q:Why is the number eight afraid of the number seven? A:Because seven ate nine.

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What do accountants suffer from that ordinary people don't? Depreciation.

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Q: Did you hear that joke about the infinite line? A: Don’t worry, It doesn’t have a point!

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Chuck Norris can divide prime numbers into whole numbers.

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