Analysis of the Effect of Self Confidence on Students’ Mathematical Problem Solving Ability. Jurnal Mercumatika : Jurnal Penelitian Matematika dan Pendidikan Matematika, [S. l.], v. 9, n. 1, 2025. DOI: 10.26486/jm.v9i1.4402. Disponível em: https://ejurnal.mercubuana-yogya.ac.id/index.php/mercumatika/article/view/4402. Acesso em: 30 jun. 2026.