What is the missing number?
[4984] What is the missing number? - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 75 - The first user who solved this task is Djordje Timotijevic
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What is the missing number?

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 75
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #riddles
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After John had purchased movie...

After John had purchased movie tickets for himself and his girlfriend, she went inside to find seats while he got some popcorn. By the time he was served, the previews were being shown and the theater was dark. John stumbled his way through the dark, sat down and gave his girlfriend a kiss.
Then he heard a familiar voice say, "John, I'm back here."
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Aluminium isolated

In 1886, Charles M. Hall, a young U.S. chemist, completed his electrolytic process for the separation of aluminum from its ore, a mere eight months since he graduated from college. He dissolved the alumina ore in a bath of cryolyte (a mineral containing flourine, sodium and aluminum) and passed electric current through the solution. The process he patented (2 Apr 1889) was the first to become an inexpensive, commercial application. Production began in Nov 1888 by the Pittsburgh Reduction Company started , which later became ALCOA, the Aluminum Company of America.
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