eng Science and Education Publishing Journal of Mathematical Sciences and Applications 2014-02-25 2 1 4 9 10.12691/jmsa-2-1-2 JMSA2014212 article Dilek Ta?tekin 1 Salih Yal?inba? salih.yalcinbas@cbu.edu.tr 1 Department of Mathematics Celal Bayar University, Muradiye, Manisa, Turkey In this study, we present a reliable numerical approximation of the some first order nonlinear ordinary differential equations with the mixed condition by the using a new Fermat collocation method. The solution is obtained in the form of a truncated Fermat series with easily determined components. Also, the method can be used to solve Riccati equation. The numerical results show the effectuality of the method for this type of equations. Comparing the methodology with some known techniques shows that the existing approximation is relatively easy and highly accurate. http://pubs.sciepub.com/jmsa/2/1/2/jmsa-2-1-2.pdf Nonlinear ordinary differential equations Riccati equation Fermat polynomials collocation points