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Calculate the number 9693

NUMBERMANIA: Calculate the number 9693 using numbers [5, 3, 8, 7, 48, 720] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 30

The first user who solved this task is Sanja Šabović.

#brainteasers #math #numbermania

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Sheng Wang: Man With a Comb Over

If you can show me a man with a comb over, I can show you a man who thinks that by crushing a bag of chips, you make more chips.

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Aleksandr Popov

Died 31 Dec 1905 at age 46 (born 4 Mar 1859).Russian physicist and electrical engineer acclaimed in Russia as the inventor of radio. He became an instructor at the Russian Navy's Torpedo School. Learning of Hertz's work, in 1895 Popov constructed an apparatus that could register electrical disturbances due to lightning. He applied it for receiving man-made signals. In 1896, he demonstrated a radiotelegraph system which transmitted Morse code. In Feb 1904, Popov first demonstrated radio transmission of the human voice. His invention was first used by the Russian navy. However, Russia's first radio factory was established by the Marconi company.

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