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MATH PUZZLE: Can you replace...

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

Correct answers: 135

The first user who solved this task is Thinh Ddh.

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World Book and Copyright Day Joke

April 23rd is World Book and Copyright Day! Find a joke about it!

A man walks into a library and asks the librarian, "Do you have any books on how to create suspense?"
The librarian pauses for a moment, then says, "Yes, but I'm not going to tell you where they are!"

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Michael Ellis DeBakey

Born 7 Sep 1908. American physician, and pioneer cardiovascular surgeon who invented or perfected many medical devices, techniques and procedures, including arterial bypass operations, artificial hearts, heart pumps and heart transplants. DeBakey also played a key role in developing the Mobile Army Surgical Hospitals (M.A.S.H.) located only minutes from the battlefield to reduce the fatility rate for critically wounded soldiers. His Dacron graft revolutionized aneurysm repair. DeBakey performed (1953) the first successful carotid endarterectomy treatment for stroke, the first successful artificial heart implant (1963) and directed the world's first multiple-organ transplants (1968) from one donor giving a heart, a lung and both kidneys to four recipients.«

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