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MATH PUZZLE: Can you replace...

MATH PUZZLE: Can you replace the question mark with a number?

Correct answers: 288

The first user who solved this task is Erkain Mahajanian.

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Sounds more like a nightmare...

An older couple wakes up in the morning and the husband looks over at his wife and says, " Wow! You wouldn't believe the dream I had..."

The wife replies, "Yes, go on tell me."

So the husband says "I had a dream that you left me after 20 years of being married."

The wife says, "Oh, it sounds more like a nightmare."

The husband says, "No, I am sure it was a dream."

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Sir William McCrea

Born 13 Dec 1904; died 25 Apr 1999 at age 94. Sir William Hunter McCrea was an Irish theoretical astrophysicist whose early work was in quantum physics, relativity and pure mathmatics, but he gradually turned to applying theoretical physics in astronomy. He ranged from considering the stellar atmospheres, planet formation, cosmology and indeed, the formation of stars and the universe. He was an early advocate that stars have a high hydrogen content. He studied gas dynamics, as in the formation of hydrogen in molecular form in dusty interstellar clouds, and developed a theory of the transition from increasing density to conditions sufficient for gravitational collapse and possible star formation. Although he at first was open-minded to the steady state theory of the universe proposed by Hermann Bondi, Thomas Gold and Fred Hoyle, McCrea's work and others accumulated evidence for the Big Bang theory.«

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