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Find number abc

If c9ac8 - 11288 = 2815b find number abc. Multiple solutions may exist.
The first user who solved this task is Nasrin 24 T.
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A man goes to get his salary c...

A man goes to get his salary cheque and when he opens it he discovers that his employer has overpaid him by £2000.
He decides not to tell anybody and keeps quiet.
At the end of the following month when he opens the cheque, he sees that he's been underpaid by £2000.
Fuming, he goes to have it out with his employer. "Sir, I think you've made a mistake on my cheque."
"And how do you figure that?" his employer asks.
"It seems I've been underpaid by £2000."
"So?"
"No disrespect Sir, but I want my money."
"Last month I overpaid you by £2000 and you didn't complain so why now?"
"Well Sir, thing is I don't mind if you make a mistake once but if it becomes a habit I have to say something."
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Ferdinand von Lindemann

Born 12 Apr 1852; died 6 Mar 1939 at age 86.Carl Louis Ferdinand von Lindemann was a German mathematician who was the first to prove that is transcendental (it is not a solution of any algebraic equation with rational coefficients). This finally established the insoluble nature of the classical Greek mathematical problem of squaring the circle (constructing a square with the same area as a given circle using ruler and compasses alone.) In 1873, Lindemann visited Hermite in Paris and discussed the methods which Hermite had used in his proof that e, the base of natural logarithms, is transcendental. Following this visit, Lindemann was able to extend Hermite's results to show that was also transcendental (1882).«[DSB and other sources give death date as 6 Mar 1939. EB gives 1 Mar 1939.]
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