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Why Do We Cross Off Groups Of Five On A Tally Chart?
24 April 2019, 15:37
Question: Why do we cross off groups of five when we count on a tally chart?
Name: Jeremy, Wimbledon
Qualification: Maths Historian
Answer: It’s a way of counting on paper the same way we used to with our hands.
In around the 1850s, you would have a 'tally man' to assist you with whatever you were counting and he would prove he was correct by showing you the groups of five on his hands.