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J. Andrés Cerquera

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MATH PUZZLE: Can you replace the question mark with a number?

Albert C. Gilbert

Died 24 Jan 1961 at age 76 (born 15 Feb 1884).Albert Carlton Gilbert was an American inventor who patented the Erector set after he founded the A.C. Gilbert Co. New Haven, Connecticut (1908) to manufacture boxed magic sets. In 1913, he introduced Erector Sets. Similar construction toys then existed, such as Hornby's Meccano set made in England. Meccano sets included pulleys, gears, and several 1/2" wide strips of varying length with holes evenly spaced on them. Gilbert needed something unique for his Erector sets, so he created the square girder, made using several 1" wide strips with triangles cut in them. These had their edges bent over so 4 strips could be screwed together to form a very sturdy square girder. Over the next 40 years, some 30 million Erector Sets were sold.«

A magician was working on a cr...

A magician was working on a cruise ship in the Caribbean. The audience would be different each week, so the magician allowed himself to do the same tricks over and over again. There was only one problem: The captain's parrot saw the shows every week and began to understand what the magician does in every trick.
Once he understood that, he started shouting in the middle of the show: Look, it's not the same hat. Look, he is hiding the flowers under the table! Hey, why are all the cards the Ace of Spades?
The magician was furious but couldn't do anything, it was the captain's parrot after all. One day the ship had an accident and sunk. The magician found himself on a piece of wood, in the middle of the ocean, with the parrot of course. They stared at each other with hate, but did not utter a word. This went on for a day, and another, and another.
After a week the parrot finally said: OK. I give up. What'd you do with the boat ?
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