Calculate the number 690
[182] Calculate the number 690 - NUMBERMANIA: Calculate the number 690 using numbers [7, 8, 4, 5, 10, 100] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 53 - The first user who solved this task is Sanja Šabović
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Calculate the number 690

NUMBERMANIA: Calculate the number 690 using numbers [7, 8, 4, 5, 10, 100] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 53
The first user who solved this task is Sanja Šabović.
#brainteasers #math #numbermania
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A man and his young wife were...

A man and his young wife were in divorce court, but the custody of their children posed a problem.
The mother leaped to her feet and protested to the judge that since she brought the children into this world, she should retain custody of them.
The man also wanted custody of his children, so the judge asked for his justification.
After a long silence, the man slowly rose from his chair and replied...
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Kurt Alder

Died 20 Jun 1958 at age 55 (born 10 Jul 1902).German chemist was the corecipient (with Otto Diels) of the Nobel Prize for Chemistry in 1950 for their development of the Diels-Alder reaction (1928), or diene synthesis, a widely used method of synthesizing cyclic organic compounds. In this type of reaction, a compound containing two double bonds separated by a single bond (i.e. a conjugated diene) adds to a suitable compound containing one double bond (dienophile) to give a ring compound. In the dienophile, the double bond must have a carbonyl group on each side. The reaction proceeds in the mildest conditions, is of general application, and hence of great utility in synthesis. It is used in the synthesis of natural products, such as sterols, vitamin K, cantharides, and synthetic polymers.
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