Find number abc
[7136] Find number abc - If 7a7bc - abb70 = 791c find number abc. Multiple solutions may exist. - #brainteasers #math - Correct Answers: 20
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Find number abc

If 7a7bc - abb70 = 791c find number abc. Multiple solutions may exist.
Correct answers: 20
#brainteasers #math
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Ethical Problem

An attorney had just finished a consultation with an elderly, nearly blind widow, for which he charged her $100. The widow opened her purse and removed a $100 bill. When the lawyer accepted it, he noticed there was another 100 stuck to it. Immediately the lawyers keen legal mind realized he was faced with a vital ethical question:

Should he tell his partner?

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Municipal fire alarm system

In 1852, the first municipal electric fire alarm system using call boxes with automatic signaling indicating a fire's location was placed into operation in Boston. It proved very effective in saving lives and avoiding great loss of property resulting from fire. (As recently as 16 Dec 1835, a great fire in New York City had resulted in the demolition of 600 buildings, at a loss of $20 million.) The success of Boston's fire alarm system was soon apparent, and the system spread across the United States and Canada. The inventors, William Channing and Moses Farmer, received a U.S. patent on their system on 19 May 1857 (No. 17,355). Their original 28-page proposal was given to the mayor of Boston on 27 Mar 1851 and construction began 7 Sep 1851.«
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