Replace the question mark with a number
[3243] Replace the question mark with a number - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 415 - The first user who solved this task is Sanja Šabović
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Replace the question mark with a number

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 415
The first user who solved this task is Sanja Šabović.
#brainteasers #math #riddles
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One of the regular foursome wa...

One of the regular foursome was sick, so a new member named George filled in. He was very good and pleasant company so they asked him to join them again the following Sunday. "9:30 okay?"
George said, "Fine, but I may be about ten minutes late. Wait for me."
The following Sunday George showed up right on time. Not only that he played left-handed and beat them.
They agreed to meet the following Sunday at 9:30. George again said, "Okay, but I may be about ten minutes late. Wait for me."
The next Sunday there was George, punctual to the dot. This time he played right-handed and beat them again.
"Okay, for 9:30 next Sunday?" one of the foursome asked.
George said, "Sure, but wait for me if I'm ten minutes late."
Another golfer jumped in. "Wait a minute. You always say you may be ten minutes late. But you're always right on time and you beat us whether you play right or left handed."
George said, "Well, that's true. I'm superstitious. If I wake up and my wife is sleeping on her right side, I play right-handed. If she's sleeping on her left side, I play left-handed."
"What if she's lying on her back?"
George said, "That's when I'm ten minutes late!"
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Pyrex patented

In 1919, Pyrex glass was issued a U.S. patent (No. 1,304,623). The inventors, Eugene C. Sullivan and William C. Taylor were company research chemists who assigned the patent to Corning Glass Works. Pyrex is the trademark for their sodium borosilicate glass. The original patent, filed on 24 Jun 1915, foresaw the applications including glass baking dishes and laboratory ware. The useful properties of this composition of glass were a low linear thermal expansivity, relatively high coefficient of thermal conductivity (internal heat transfer) and high stability (to resist chemical attack). The composition specified a high silica content of more than 70%. The patent included a discussion of the role of including in the composition certain porportions of alumina, boric acid, antimony and lithia.«
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