Replace the question mark with a number
MATH PUZZLE: Can you replace the question mark with a number?Correct answers: 354
The first user who solved this task is Manguexa Wagle.
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Foam rubberIn 1929, foam rubber was developed at the Dunlop Latex Development Laboratories in Birmingham. British scientist E.A. Murphy whipped up the first batch in 1929, using an ordinary kitchen mixer to froth natural latex rubber. His colleagues were unimpressed - until they sat on it. Within five years it was everywhere, on motorcycle seats, on London bus seats, Shakespeare Memorial Theatre seats, and eventually in mattresses. |