“DIFFERENTIAL ITEM FUNCTIONING OF 2020-2021 NIGERIAN BASIC EDUCATION CERTIFICATE EXAMINATION MULTIPLE CHOICE QUESTIONS IN MATHEMATICS IN ABIA STATE”, JSTME, vol. 6, no. 1, pp. 1–13, Nov. 2023, Accessed: Jun. 24, 2026. [Online]. Available: https://journals.unizik.edu.ng/jstme/article/view/2828