Abstract: The study investigated into gender issues and academic performance of Senior School students in Mathematics computational tasks in Ekiti State, Nigeria, in order to final out whether boys perfromed better than girls in Mathematics computational tasks and that type of school a student attends enhances his performance in Mathematics computation. The sample of this study consisted of 500 students in Senior Secondary School three classes randomly selected from eleven secondary schools in Ekiti State, Nigeria. Stractified sampling technique was used to divide the state into three strata. Three hypotheses were generated and tested with students t-test analysis at = 0.05 level of significance. The result of the study showed that students in single sex schools perfromed better than those students in mixed schools in Mathematical computation and boys in boys` schools did not perform significantly better than girls in girls` schools.