Calculate A+B+C+D
[6356] Calculate A+B+C+D - Look at the series (10, C, B, 59, A, 227, 451, 899, 1795, 3587, D, 14339, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A+B+C+D! - #brainteasers #math - Correct Answers: 42 - The first user who solved this task is Nasrin 24 T
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Calculate A+B+C+D

Look at the series (10, C, B, 59, A, 227, 451, 899, 1795, 3587, D, 14339, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A+B+C+D!
Correct answers: 42
The first user who solved this task is Nasrin 24 T.
#brainteasers #math
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The Dentist

The dentist pulls out a Novocain needle to give the man a shot, so he can extract the man's tooth. 'No way! No needles. I hate needles' the patient said.
The dentist starts to hook up the nitrous oxide and the man objects I can't do the gas thing. The thought of having the gas mask on is suffocating to me! The dentist then asks the patient if he has any objection to taking a pill. 'No objection,' the patient says. 'I'm fine with pills.'
The dentist then returns and says, Here's a Viagra tablet.'
The patient says, 'Wow! I didn't know Viagra worked as a pain killer!'
It doesn't' said the dentist, 'but it's going to give you something to hold on to when I pull your tooth.      

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Dry-cell patent

In 1887, German scientist, Dr. Carl Gassner, was issued a U.S. patent (No. 373,064), the first in the U.S. for a “dry” cell. Gassner had already patented his invention in Germany (No. 37,758) on 8 Apr 1886, and also in Austria, Belgium, England, France and Hungary in the same year. The sealed zinc shell which contained all the chemicals was also the negative electrode. Later, he improved the shelf life of the battery by adding zinc chloride to the electrolyte to reduce corrosion of the zinc shell. Gassner's battery was much like the carbon-zinc, general-purpose batteries sold today. By 1896, the National Carbide Company (later Union Carbide and Eveready) produced the first consumer dry cell battery. Two years later, the company made the first D cell.«[Image: The six-inch, 1.5 volt Columbia Dry Cell marketed by NCC in 1896.]
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