Calculate a x b
[318] Calculate a x b - Look at the series (156, 615, 561, a, 413, 341, 132, b), determine the pattern, and calculate a x b. - #brainteasers #math - Correct Answers: 61 - The first user who solved this task is Slobodan Strelac
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Calculate a x b

Look at the series (156, 615, 561, a, 413, 341, 132, b), determine the pattern, and calculate a x b.
Correct answers: 61
The first user who solved this task is Slobodan Strelac.
#brainteasers #math
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Watch For Fallen Rocks

Driving down a remote road, a motorist sees a sign that says: "Watch For Fallen Rocks."

A couple of miles of careful driving later, he spots some pebbles and stops to pick a few up. Arriving in the next town, the motorist carries the stones into the highway maintenance office.

Placing them on the counter, he says to an official: "Here are your fallen rocks. Now where's my watch?"

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Jean-Marie Lehn

Born 30 Sep 1939.French chemist who shared (with Charles J. Pedersen and Donald J. Cram) the 1987 Nobel Prize for Chemistry, for his contribution to the laboratory synthesis of molecules that mimic the vital chemical functions of molecules in living organisms. Such molecules have a highly selective, structure specific interaction. These molecules can “recognize”each other and choose with which other molecules they will form complexes. Of low molecular weight and with very special properties, the molecules in these compounds bind in a selective manner, like a key fits a lock.
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