Country: Romania
School: Colegiul Tehnic C.D. Nenitescu Baia Mare
Grade and age: 12th Grade (18-19 years old)
Discipline: Soil Quality Monitoring
Topic: Quality Chemical Indicators
Romania
The sets of numbers
Country: Romania
School: Colegiul Națonal „Emil Racoviță” Cluj-Napoca
Grade and age: 9th grade (14-15 years old)
Discipline: Mathematics
Topic: Sets of numbers