What number should replace the X to the magic square?
[632] What number should replace the X to the magic square? - What number should replace the X to the magic square? Author: Nebojsa Jevtovic - #brainteasers #math #riddles #magicsquare - Correct Answers: 60 - The first user who solved this task is Sanja Šabović
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What number should replace the X to the magic square?

What number should replace the X to the magic square? Author: Nebojsa Jevtovic
Correct answers: 60
The first user who solved this task is Sanja Šabović.
#brainteasers #math #riddles #magicsquare
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A man asked his doctor if he t...

A man asked his doctor if he thought he'd live to be 100.
The doctor asked the man, "Do you smoke or drink?"
"No," he replied. "I've never done either."
"Do you gamble, drive fast cars, or fool around with women?" inquired the doctor.
"No, I've never done any of those things either."
"Well, then," said the doctor, "why would you want to live to be 100?"
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Record speed

In 1967, the X-15 rocket plane achieved a world record speed of Mach 6.7, which is 4,520 mph or over a mile per second, with U.S. Air Force pilot Pete Knight. It reached an altitude of 192,100 feet (58,552 m). Its internal structure of titanium was covered with a skin of Inconel X, a chrome-nickel alloy. To save fuel, the X-15 was air launched from a B-52 aircraft at about 45,000 ft. Test flights between 8 Jun 1959 and 24 Oct 1968 provided data on hypersonic air flow, aerodynamic heating, control and stability at hypersonic speeds and piloting techniques for reentry used in the development of the Mercury, Gemini, and Apollo spaceflight programs. The X-15 reached 354,200 feet (67 miles) on 22 Aug 1963.«[Image: NASA artist's conception of the flight.]
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