Find number abc
[1928] Find number abc - If a6a16 - abccc = cc7b find number abc. Multiple solutions may exist. - #brainteasers #math - Correct Answers: 63 - The first user who solved this task is Djordje Timotijevic
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Find number abc

If a6a16 - abccc = cc7b find number abc. Multiple solutions may exist.
Correct answers: 63
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math
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Three doctors

Three doctors are waiting in line to get into the Pearly Gates. St. Peter walks out and asks the first one, "What have you done to enter Heaven?"

"I am a pediatrician and have brought thousands of the Lord's babies into the world."

"Good enough to enter the gates," replied St. Peter and in he goes. The same question is asked of the second doctor.

"I am a general practioner and go to Third World countries three times a year to cure the poor." St. Peter is impressed and allows him through the gates. The third doctor steps up in line and knowing the question, blurts out, "I am a director of an HMO."

St. Peter meditates on this for a while and then says, "Fine, you can enter Heaven...but only for 2 days."

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Helicopter

In 1922, Henry A. Berliner demonstrated the first helicopter prototype for representatives of the U.S. Bureau of Aeronautics in College Park, Maryland. Berliner made this first ever controlled horizontal helicopter flight in a war-surplus Nieuport 23 fighter with tilting tail rotor, and a short-span upper wing with 14-ft helicopter blades at the tips. It was powered with a Bentley 220 hp engine to the front which turned the two counter-rotating lifting rotors through a series of geared shafts. The two rotors could tilt slightly in opposite directions to control yaw. Two sets of five 36-in x 8-in louvers, located below each rotor, opened and closed differentially to provide roll control by presenting a flat surface, which reacted against the rotor downwash.
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