Calculate the number 2223
[7806] Calculate the number 2223 - NUMBERMANIA: Calculate the number 2223 using numbers [4, 2, 7, 7, 94, 790] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 1
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Calculate the number 2223

NUMBERMANIA: Calculate the number 2223 using numbers [4, 2, 7, 7, 94, 790] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
#brainteasers #math #numbermania
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Two students were arguing when...

Two students were arguing when their teacher entered the classroom. The teacher says, “Why are you arguing?” One boy answers, “We found a ten dollar bill and decided to give it to whoever tells the biggest lie.” "You should be ashamed of yourselves," said the teacher, "When I was your age I didn’t even know what a lie was." The boys gave the ten dollars to the teacher.
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Valdemar Poulsen

Born 23 Nov 1869; died 23 Jul 1942 at age 72.Danish engineer who in 1903 developed the first device for generating continuous radio waves, thus aiding the development of radio broadcasting. His arc transmitter increased the frequency range of Duddell's Singing Arc (1900) from the audio range to radio waves, enabling speech to be transmitted up to a radius of 150 miles. By 1920 the Poulsen Arc transmitter was as powerful as 1000kW with ranges of up to 2,500 miles. An earlier invention was the Telegraphone, for which he filed a patent in Denmark on 1 Dec 1898. This was the first device in history to use magnetic sound recording, although this invention remained commercially impractical due to low sound output until the advent of vacuum tube amplifiers in the 1930s.[Biog. Dict. of the Hist. of Tech. gives date of death 23 Jul 1942. DSB and EB give Jul 1942.]
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