摘要:This study presents the findings of the relationship bet ween students' achievement in mathematics conducted by the West African Examination Council (WAEC) and the National Examination Council (NECO) in four selected secondary schools in Ifedayo Local Government Area , Osun State, Nigeria. The analysis showed that there is significant positive relationship between mathematics in all the selected schools contrary to the hypothesis that says there is no relationship in WAEC and NECO mathematics results in the schools. It is therefore recommended that students sho uld develop more interest in sitting for either of the two examinations since they produce equivalent results