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If 7a421 - 57acc = 1b7bb find number abc. Multiple solutions may exist.

Georgius Agricola

Born 24 Mar 1494; died 21 Nov 1555 at age 61. German mineralogist and scholar known as “the father of mineralogy,” who was among the first to found a natural science upon observation and independently from theories of the ancients. Having studied medicine, he became interested in mineralogy through his study of miners' diseases. His contributions to mining geology and metallurgy, mineralogy, structural geology, and paleontology, formed a foundation for further systematic study of the Earth and of its rocks, minerals, and fossils. His most important work De Re Metallica (published a year after his death) summarized all the practical knowledge gained by Saxon miners. He may have coined the word petroleum (“rock oil”). As was the fashion of the day, he Latinized his real name of Georg Bauer (both Bauer in German and Agricola in Latin mean “farmer”.)

The Chinese Doctor & The Lawyer

A Chinese Doctor can't find a job in a Hospital in the US, so he opens his own clinic and puts a sign outside
An American lawyer thinks this is a great opportunity to earn $100 and goes to the clinic.
Lawyer: 'I have lost my sense of taste.'
Chinese: 'Nurse, bring medicine from box No. 22 and put 3 drops in patient's mouth.'
Lawyer: 'Ugh. this is kerosene.'
Chinese: 'Congrats, your sense of taste is restored. Give me $20.'
The annoyed lawyer goes back after a few days to recover his money.
Lawyer: 'I have lost my memory. I cannot remember anything.'
Chinese: 'Nurse, bring medicine from box no. 22 and put 3 drops in his mouth.'
Lawyer (annoyed): 'This is kerosene. You gave this to me last time for restoring my taste.'
Chinese: 'Congrats. You got your memory back. Give me $20.'
The fuming lawyer pays him, and then comes back a week later determined to get back $100.
Lawyer: 'My eyesight has become very weak I can't see at all.'
Chinese: 'Well, I don't have any medicine for that, so take this $100.'
Lawyer (staring at the note): 'But this is $20, not $100!!'
Chinese: 'Congrats, your eyesight is restored. Give me $20'


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