![]() Photo by Robert Ruggiero on Unsplash The BAR Symbol Most people can only retain seven items of new information in their short-term memory and consider seven their favorite number. It’s no wonder that when Charles Fey invented the slot machine in 1895, he featured the lucky number. But even deeper, seven is ingrained in our psyche. ![]() The lucky number pops up in myths, tales and religions worldwide and has become an integral part of our human existence.īut why seven? Mathematicians consider seven a special number because it’s an optimal-prime number. There are seven days of the week, seven notes on a musical scale, and the Seven Wonders of the World. Throughout history, seven has been an important number. When you picture slot machines, you probably see images of fruit and the lucky number seven, but have you ever wondered where they came from? These symbols weren’t chosen by accident and have now transformed into iconic motifs.
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