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Informationen zum Autor Michael Shermer (born September 8, 1954) is an American science writer, historian of science, founder of The Skeptics Society, and editor-in-chief of its magazine Skeptic , which is largely devoted to investigating pseudoscientific and supernatural claims. The Skeptics Society currently has over 55,000 members. Shermer engages in debates on topics pertaining to pseudoscience and religion in which he emphasizes scientific skepticism. Shermer is producer and co-host of the 13-hour Fox Family television series Exploring the Unknown which was broadcast in 1999. From April 2001 to January 2019, he was a monthly contributor to Scientific American magazine with his Skeptic column. He is also a scientific advisor to the American Council on Science and Health (ACSH). Shermer was once a fundamentalist Christian, but ceased to believe in the existence of God during his graduate studies. He also describes himself as an advocate for humanist philosophy as well as the science of morality. Dr Arthur Benjamin is a professor of Mathematics in California. He is also a professional magician. Klappentext How to calculate almost anything in your head.Did you know that it's easier to add and subtract from left to right, rather than the other way round?You can be taught to square a three-digit number in seconds. Learn how to perform lightning calculations in your head, discover methods of incredible memorisation and other feats of mental agility. Learn maths secrets for the real world, from shopping to calculating a restaurant tip and figuring out gambling odds (or how much you've won). Learn how to solve sudoku faster. Vorwort How to calculate almost anything in your head - and how to do maths for people who don't do maths Zusammenfassung From two renowned mathematical geniuses, a professor and a columnist for Scientific American, comes an accessible guide to mentally calculating maths at lightning speed and amazing ease....
