MATH PUZZLE: Can you replace...
[3546] MATH PUZZLE: Can you replace... - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 366 - The first user who solved this task is Linda Tate Young
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MATH PUZZLE: Can you replace...

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 366
The first user who solved this task is Linda Tate Young.
#brainteasers #math #riddles
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A college student challenged a...

A college student challenged a senior citizen, saying it was impossible for their generation to understand his. “You grew up in a different world,” the student said. “Today we have television, jet planes, space travel, nuclear energy, computers…”
Taking advantage of a pause in the student’s litany, the geezer said, “You’re right. We didn’t have those things when we were young; so we invented them! What are you doing for the next generation??”
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First use of chemical symbols in British textbook.

In 1832, Edward Turner wrote a Preface to the 4th edition of his textbook, Elements of Chemistry (published 1833), in which he explained his use of symbols to represent reactants and products in a chemical reaction of Cyanogen, because he found they solved the difficulty of giving a “clear and concise description of. the phenomena in ordinary language.” His was the first use of chemical symbols in a British chemistry textbook. Turner used some algebra-type notation as suggested by William Whewell with parts of Jöns Jacob Berzelius's system, in which iron was represented by Fe (from Ferrum) and oxygen by O. Thus Fe + O represented one oxide of iron, and 2Fe + 3O represented another. Dots over the symbol indicated degree of oxidation, and an underline stood for two equivalents of a substance.«
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