Calculate the number 399
[7228] Calculate the number 399 - NUMBERMANIA: Calculate the number 399 using numbers [4, 2, 7, 4, 22, 670] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 2
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Calculate the number 399

NUMBERMANIA: Calculate the number 399 using numbers [4, 2, 7, 4, 22, 670] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
#brainteasers #math #numbermania
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Once there was a golfer whose...

Once there was a golfer whose drive landed on an anthill. Rather than move the ball, he decided to hit it where it lay. He gave a mighty swing. Clouds of dirt and sand and ants exploded from the spot. Everything but the golfball. It sat in the same spot.
So he lined up and tried another shot. Clouds of dirt and sand and ants went flying again. The golf ball didn't even wiggle.
Two ants survived. One dazed ant said to the other, "Whoa! What are we going to do?"
Said the other ant, "I don't know about you, but I'm going to get on the ball."
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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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