Sir John Napier invented Napier's rods to add two numbers is it true or false
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Napier's bones is a manually-operated calculating device created by John Napier of Merchiston, Scotland for the calculation of products and quotients of numbers. The method was based on lattice multiplication, and also called 'rabdology', a word invented by Napier. Napier published his version in 1617
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false
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he invented Napier's bone
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