1. Department of Mathematics Education, Faculty of Education, Başkent University, Bağlica Campus, Ankara, Etimesgut 06530, Turkey
2. Department of Mathematics, Faculty of Management and Marketing, Rzeszów University of Technology, 2 Wincentego Pola Street, Rzeszów 35-959, Poland
3. Institute of Mathematics, University of Rzeszów, 16A Rejtana Street, Rzeszów 35-310, Poland