Proizvod vam ne odgovara? Nema veze! Možete nam vratiti unutar 30 dana
S poklon bonom ne možete pogriješiti. Za poklon bon primatelj može odabrati bilo što iz naše ponude.
30 dana za povrat kupljenih proizvoda
This study of a group of students from first grade through high school focuses on their work on a set of combinatorics tasks. The results offer insights into various topics such as the foundations of proof building and the tools needed to make connections.§