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석완징

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MATH PUZZLE: Can you replace the question mark with a number?
Cubes of the same size are stacked in the corner of a room as shown. How many cubes are there?
MATH PUZZLE: Can you replace the question mark with a number?

Valdemar Poulsen

Died 23 Jul 1942 at age 72 (born 23 Nov 1869).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.]

The Local sheriff was looking...

The Local sheriff was looking for a new deputy. When a blonde walks in to try for the job, he asks her "Okay, what is 1 and 1?"
"Eleven", she replies.
The sheriff thinks to himself, "That's not what I wanted, but I guess she's right!"
"What two days of the week begin with the letter T?" he asks.
"Today and Tomorrow", the blonde answers.
The sheriff is again surprised that the blonde has supplied a correct answer that had not even occurred to him.
"Now listen carefully, who killed Abe Lincoln?" he asks her.
The blonde looks a little surprised. She thinks really hard for a minute and finally admits, "I don't know."
"Well, why don't you go home and work on that one for a while?"
So, the blonde wanders over to the beauty parlor, where her pals are waiting to hear the results of the interview.
The blonde was exultant. "The interview went great!" she says. "First day on the job and I'm already working on a murder case!"
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