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Find number abc

If a2ab0 - 3a705 = cc1a5 find number abc. Multiple solutions may exist.

Correct answers: 26

The first user who solved this task is Nasrin 24 T.

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Animal testing

John is a PETA (People for the Ethical Treatment of Animals) member and is discussing animal welfare with his friend Ludwik.
John says, "Animal testing is such a cruel and bad practice."
Ludvick comments, "Yeah, they get all nervous and give the wrong answers."

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Pump handle removal stops cholera epidemic

In 1854, Dr. John Snow removed the handle of the Broad Street water pump in London, thus effectively halting further spread of cholera. He had mapped the outbreaks, and thus suspected contamination of this community source of water. He was correct in this, one of the most symbolic gestures in the history of public health. Within days after the pump handle was removed, new cases of illness had ceased. Site investigation showed raw sewage from a leaking sewage cesspool that had contaminated the well water. Thus Snow, who was already a celebrated anaesthetist became a pioneer of epidemiology. The "John Snow" pub now stands beside the pink granite slab marking the site of the original pump.«

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