Points on a ring: An interactive walkthrough of a popular math problem

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Founded by brothers Ralph and Albert Slazenger in 1881, the brand became a go-to for golf and tennis equipment and was appointed the official ball supplier for Wimbledon in 1902.

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"There is something tactile about it when you hold it," said Dr Sara Machin, the finds lead for Access +, the consortium of archaeologists in charge of this project. "Even now it fits snugly in my hand."

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