Replace the question mark with a number
[4069] Replace the question mark with a number - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 129 - The first user who solved this task is Thinh Ddh
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Replace the question mark with a number

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 129
The first user who solved this task is Thinh Ddh.
#brainteasers #math #riddles
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Fill hollow Easter candies with mustard

Grand April Fools' Day pranks, as impressive as they are, require careful planning. And though massive, meticulously planned pranks certainly gets a rise out of unlucky prankees, it's the subtle pranks that pack the most surprise.
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Flashbulb patented

In 1930, Johann Ostermeyer of Athegnenber, Germany, patented his "Improvements in flash lights used for photographic purposes." (UK patent 324,578). The modern photographic safety flash bulb evolved from this design, which used aluminium wire or foil in oxygen. Unfortunately, all too frequently, these versions exploded! The flashbulb was introduced to the American market in 1930 by General Electric. Flash cubes came along in 1966, and the percussively ignitable "Magicube" in 1970.
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