Find number abc
[7502] Find number abc - If c9cac - 4c937 = 13c6b find number abc. Multiple solutions may exist. - #brainteasers #math - Correct Answers: 2
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Find number abc

If c9cac - 4c937 = 13c6b find number abc. Multiple solutions may exist.
Correct answers: 2
#brainteasers #math
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Wake up call

A man and his wife were having some problems and were giving each other the silent treatment. The next week, the man realized that he'd need his wife to wake him at 5 a.m. for an early flight.

Not wanting to be the first to break the silence, he finally wrote on a piece of paper: "Please wake me at 5 a.m."

The next morning the man woke up, only to discover it was 9 a.m. and he'd missed his flight.

Furious, he was about to go and scream at his wife when he noticed a piece of paper by the bed that said: "It's 5 a.m. Wake up.

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Sergey Nikolayevich Winogradsky

Born 1 Sep 1856; died 25 Feb 1953 at age 96.Russian microbiologist who helped to establish bacteriology as a major biological science. He was first to isolate the bacteria responsible for nitrification and nitrogen fixation by soil bacteria (1890).Winogradsky also studied bacteria that recycle other vital elements for use by other organisms - including ‘iron bacteria', and those which metabolize sulfur (1887-9) - deriving metabolic energy from inorganic nutrients. Previously, only organic substrates were considered suitable for microbes. The "Winogradsky column" is still used as an enrichment culture that simulates the muddy habitat of anoxygenic photosynthetic bacteria.[Name also spelled Sergei or Sergius.]
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