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MATH PUZZLE: Can you replace...

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

Correct answers: 309

The first user who solved this task is Manguexa Wagle.

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My husband and I both work, so

My husband and I both work, so our family eats out a lot.
Recently, when we were having a rare home-cooked meal, I handed a glass to my three-year-old and told her to drink her milk.
She looked at me bewildered and replied, "But I didn’t order milk."

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Wood pulp paper

In 1854, pioneering samples of basswood pulp paper made by John Beardsley were reported in the New York Daily Times which reprinted an article from the Democrat newspaper of Buffalo, New York. The article described three varied samples of the new paper that were shown to the editor of the Buffalo newspaper. Basswood is a tree of the linden family. Paper-making materials then in use included grasses, rag and flax. To transform wood into pulp, the cellulose fibres must be separated. Beardsley used a mechanical means of revolving cutters. A later history of paper-making book stated that his results were not successful. Earlier patents had been issued to other inventors for the processing of wood pulp for paper.«

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