1) Did you know that in the 16th century, multiplication was considered so difficult that it was only taught in universities? 2) Did you know that Robert Recorde invented, more than 400 years ago, the two lines = to indicate equality, because “two things cannot be more equal than two parallel lines”. 3) Did you know that the sexagesimal system, which we use for the units of hours, minutes or degrees, was developed centuries ago in ancient Babylon.

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