Calculate the number 1115
[1635] Calculate the number 1115 - NUMBERMANIA: Calculate the number 1115 using numbers [2, 2, 6, 7, 63, 146] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 28 - The first user who solved this task is Sanja Šabović
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Calculate the number 1115

NUMBERMANIA: Calculate the number 1115 using numbers [2, 2, 6, 7, 63, 146] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 28
The first user who solved this task is Sanja Šabović.
#brainteasers #math #numbermania
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Perforated wrapping paper

In 1871, the first U.S. patent for perforated wrapping paper was awarded to Seth Wheeler of Albany, NY (No. 117,355). The paper was wound into rolls and could easily be torn off at the perforations. It was claimed that the fibers left between the perforations were sufficient for holding the sheets together as wound on the roll. In this way, the cost of cutting, counting and bundling stacks of pre-cut sheets was to be saved, together with making storage more convenient, and saving the paper from drying and becoming brittle by exposure to the atmosphere. Paper was already manufactured in rolls; only the step of perforation was added in its production, either with a row of holes or short cuts.
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