Mathematics teacher in Focsani discovers calculation formula

Mihai Teodor, a mathematics teacher at a high school in eastern Focsani, discovered a formula for computing the sum of the products of the digits...

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United States , Focsani , Vrancea , Romania , American , , Gazeta Matematica , Alexandru Ioan Cuza National College In Focsani , Mihai Teodor , On Line Encyclopedia , Integer Sequences , Mathematics , Teacher ,