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Calculate the number 1393

NUMBERMANIA: Calculate the number 1393 using numbers [7, 8, 1, 7, 12, 164] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 10

The first user who solved this task is Nasrin 24 T.

#brainteasers #math #numbermania

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Both Sides Of The Law

A police officer arrives at the scene of an accident, in which a car smashed into a tree.
The cop rushes over to the vehicle and asks the driver, 'Are you seriously hurt?'
'How should I know?' the man answers, 'I'm not a lawyer!'

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Vladimir Nikolayevich Ipatieff

Born 21 Nov 1867; died 29 Nov 1952 at age 85.Russian-American chemist who was one of the first to investigate high-pressure catalytic reactions of hydrocarbons and who developed a process for manufacturing high-octane gasoline. While studying in Munich (1897) Ipatieff achieved the synthesis of isoprene, the basic unit of the rubber molecule. Upon return to Russia he worked particularly on the use of high-pressure catalysis and of metallic oxides as catalysts. With these techniques, he helped to establish the petrochemical industry in both pre- and post-revolutionary Russia. Before WW I, he had synthesized isooctane, and had polymerized ethylene. After moving to the U.S. (1930), Ipatieff showed how to convert low-octane gasolines into high-octane by 'cracking' hydrocarbons at high temperatures.

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