Friends, today we are giving you one of the useful books on mathematics. That is The Trachetenberg System of Speed Maths. And before going to download and read the book, lets read a small story of our hero Jakow Trachtenberg (The inventor of a system of rapid mental Calculation known as The Trachtenberg System). He created the Trachtenberg system of mathematics, whilst a political prisoner in Hilter's concentration camps during the second world War. To keep himself sane whilst living in an extremely brutal and harsh environment, Trachtenberg immersed his mind in a world of mathematics and calculations. As concentration camps do not provide books, paper, pen or pencils nearly all of his calculations had to be performed mentally. This forced Trachtenberg to develop methods and shortcuts for performing calculations mentally. Trachtenberg developed his discoveries into a complete system of mathematics.
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