Seventh-grader Kaloyan Geshev from the 125th High School "Boyan Penev" in Sofia became a three-time champion in mental calculation. He won first place at the Mental Calculation Olympiad, which was held online. Kaloyan scored 243 points and thus..
The new world champion in mental calculation for children up to 12 years old is Bulgaria's Kaloyan Geshev, a 6th-grade student at Sofia's 125 Boyan Penev School. At the World Mental Calculation Championship held in the city of Bielefeld, Germany ,..
