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Arithmetic
Arithmetic (from the Greek ἀριθμός arithmos, "number") is a branch of mathematics that consists of the study of numbers, especially the properties of the traditional operations between them—addition, subtraction, multiplication and division. Arithmetic is an elementary part of number theory, and number theory is considered to be one of the top-level divisions of modern mathematics, along with algebra, geometry, and analysis. The terms arithmetic and higher arithmetic were used until the beginning of the 20th century as synonyms for number theory and are sometimes still used to refer to a wider
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“
There are many arts and sciences of which a miner should not be ignorant. First there is Philosophy, that he may discern the origin, cause, and nature of subterranean things; for then he will be able to dig out the veins easily and advantageously, and to obtain more abundant results from his mining. Secondly there is Medicine, that he may be able to look after his diggers and other workman ... Thirdly follows astronomy, that he may know the divisions of the heavens and from them judge the direct
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― DE RE METALLICA [TRANSLATED FROM THE FIRST LATIN EDITION OF 1556]
― DE RE METALLICA [TRANSLATED FROM THE FIRST LATIN EDITION OF 1556]
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Clever dicks will notice that the figure changes as the boat gets deeper or lighter because the area of the waterplane changes. You can go on enjoying arithmetic all night like this and never go sailing at all.
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― Sell Up & Sail
― Sell Up & Sail
