Calculate AxB
[643] Calculate AxB - Determine the pattern of the subtraction, and calculate AxB. - #brainteasers #math - Correct Answers: 27 - The first user who solved this task is Sanja Šabović
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Calculate AxB

Determine the pattern of the subtraction, and calculate AxB.
Correct answers: 27
The first user who solved this task is Sanja Šabović.
#brainteasers #math
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A Faithful Woman

An elderly Muslim lady was well-known for her faith and for her confidence in talking about it. She would stand in front of her house and say "Allah be praised" to all those who passed by.
Next door to her lived an atheist who would get so angry at her proclamations he would shout, "There ain't no Lord!!"
Hard times came upon the elderly lady, and she prayed for Allah to send her some assistance. She would pray out loud in her night prayer "Oh Allah! I need food!! I am having a hard time, please Lord, PLEASE LORD, SEND ME SOME GROCERIES!!"
One night the atheist happened to hear her as she was praying, and decided to play a prank on her. The next morning the lady went out on her porch and found a large bag of groceries. She raised her hands and shouted, "Allah be praised!."
The neighbor jumped from behind a bush and said, "Aha! I told you there was no Lord. I bought those groceries, God didn't."
The old lady laughed and clapped her hands and said, "ALLAH BE PRAISED. He not only sent me groceries, but he made the devil pay for them!"

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Sulfa drugs

In 1951, a patent for improved sulfonamide drugs was issued to James W. Clapp and Richard O. Roblin, (U.S. No. 2,554,816). Sulfa drugs are members of a group of synthetic antibacterial drugs containing the sulfanilamide molecular structure. Sulfonamides (first observed in 1932) were the first chemical substances that were systematically used to cure and prevent bacterial infections in humans. Of the 5,000 sulfa drugs prepared and tested, fewer than 20 continue to have therapeutic value because resistant strains of bacteria have developed. More potent antibacterial drugs have largely replaced the sulfa drugs. They remain useful in the treatment of urinary tract infection.[Image: The general formula of the patented drugs is a 5-membered heterocyclic sulfonamide having at least 3-hetero atoms. X is carbon or nitrogen which may have substituents such as hydroxyl, amino, acylamino or sulfonanide radicals; R and R' can be hydrogen, alkyl, alkaryl or aryl radicals; Y is sulfur or nitrogen (which in the case of nitrogen may have substituents such as an aryl or alkyl radical. Also X, Y may be part of a fused ring system in which the 5-membered ring shown forms a ring fused with a 6-membered heterocyclic ring such a pyridine.]
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