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First Calculating device in the world is?

ACalculator

BComputer

CAbacus

DNone of these

Answer:

C. Abacus


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പാസ്കലൈൻ കാൽക്കുലേറ്റർ കണ്ടുപിടിച്ചത് ഇവരിൽ ആരാണ് ?