What is the missing number?
[5769] What is the missing number? - What is the missing number? - #brainteasers #math #riddles - Correct Answers: 66 - The first user who solved this task is Nasrin 24 T
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What is the missing number?

What is the missing number?
Correct answers: 66
The first user who solved this task is Nasrin 24 T.
#brainteasers #math #riddles
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Lost In A Balloon

Two hobbyists get into their balloon for an excursion. After a while, the wind unexpectedly picks up, and the balloon goes out of control. The two balloonists, with great effort, manage to keep the balloon stable, upright, and away from power lines. But they are lost. With more effort, they get the balloon near the ground. While floating over a country road, they see a man walking below. One of the balloonists calls down to him:
"We're lost! Can you tell us where we are?"
The man thinks for a while, looks down, looks up, looks down again, stares into space for a minute, and then cries out:
"You're in a balloon!"
The wind picks up, and the balloon floats off. After a moment, one balloonist says to the other:
"That man must be a manager."
"Why?"
"Three reasons. First, he took a long time to answer. Second, he was perfectly correct. Third, his answer was perfectly useless!"
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Gaetano Arturo Crocco

Born 26 Oct 1877; died 19 Jan 1968 at age 90.Italian pioneer in aeronautics and space science who designed revolutionary airships and patented an early cyclic pitch design for helicopter rotors (1906). While the design of helicopters was in its infancy, Crocco recognized that a way to change the pitch cyclically on the blades was needed if a helicopter was to work properly in forward flight. He designed a number of airships in the early part of the 20th century and switched to designing rocket engines in the 1920s. Crocco founded the Italian Rocket Society (1951) and made many contributions to the theory of spaceflight. He calculated that a spacecraft could travel from Earth to Mars, perform a reconnaissance Mars flyby (without orbit), and return to Earth in a total time of about one year.«
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