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In school, I have just been too lazy to pay attention to maths. Yet, I was awed by anyone who could multiply big numbers in fractions of a second. It is one of things, you know – you like something greatly but you postpone learning that thing forever. We all have our associations with numbers – positive, neutral or negative. Today’s article will take you from the story of mental-arithmetic wizard to a very fascinating history of numbers depicting our common associations with numbers. It will also tell you why WD-40 is 40 not 41 or the importance of an extra “one” – 2001, A Space Odyssey or Levi’s 501 jeans.