MATH PUZZLE: Can you replace...
[4360] MATH PUZZLE: Can you replace... - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 135 - The first user who solved this task is Thinh Ddh
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MATH PUZZLE: Can you replace...

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 135
The first user who solved this task is Thinh Ddh.
#brainteasers #math #riddles
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Matt's dad picked him up from...

Matt's dad picked him up from school one afternoon. Knowing the parts for the school play were supposed to be posted today, he asked his son if he got a part. Matt enthusiastically announced that he'd gotten a part. "I play a man who's been married for twenty years."
"That's great, son. Keep up the good work and before you know it they'll be giving you a speaking part."
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John Ulric Nef

Died 13 Aug 1915 at age 53 (born 14 Jun 1862).Swiss-American chemist whose studies demonstrated that carbon can have a valence (i.e., affinity for electrons) of two (such as quinone) as well as a valence of four, thus greatly advancing the understanding of theoretical organic chemistry. He provided a basis for the modern system of chemical notation. He studied tautomerism, especially of nitroparaffins, and discovered what is now called the "Nef reaction"; the acid-catalyzed conversion of primary and secondary nitroalkanes to aldehydes and ketones, respectively. His major research was on bivalent carbon, including isonitriles, carbon monoxide, fulminates and methylene. In later years, he studied the complex reactions of sugars in alkali and acid.
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