Find number abc
[5708] Find number abc - If 9ac6a - 20ab5 = bc889 find number abc. Multiple solutions may exist. - #brainteasers #math - Correct Answers: 42 - The first user who solved this task is Djordje Timotijevic
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Find number abc

If 9ac6a - 20ab5 = bc889 find number abc. Multiple solutions may exist.
Correct answers: 42
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math
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Extra Money

This girl needed some money, so she is doing odd-jobs around her neighborhood. She decides she's not making enough money, so she goes to a rich neighborhood. She walks up to this house and rings the doorbell. The guy answers and tells her she can paint the porch. He gives her a can of paint and $25. When he goes inside, his wife says, "$25! Does she know that the porch wraps all the way around the house?"

"Oh, she'll do fine." the guy says.

An hour later, the doorbell rings. It's the girl. She says, "I'm finished. I even had some extra paint, so I put another coat on."

The guy is surprised. Then the girl says, "Oh, and by the way, that's not a Porsche, that's a Ferrari."

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Frans Cornelis Donders

Died 24 Mar 1889 at age 70 (born 27 May 1818).Franciscus Cornelis Donders was a Dutch ophthalmologist, the most eminent of 19th-century Dutch physicians, whose investigations of the physiology and pathology of the eye made possible a scientific approach to the correction of refractive disabilities such as nearsightedness, farsightedness, and astigmatism. He found (1858) that hypermetropia (farsightedness) is caused by a shortening of the eyeball, so that light rays refracted by the lens of the eye converge behind the retina. He discovered (1862) that the blurred vision of astigmatism is caused by uneven and unusual surfaces of the cornea and lens, which diffuse light rays instead of focusing them.
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