We discuss the following BVP y(2m)(t)=f(t,y(t),y′(t),…,y(2m-2)(t),y(2m-1)(t)),t∈(0,1), y(2i+1)(0)=y(2i)(1)=0, 0≤i≤m-1,where(-1)^mf:[0,1]×R^2m→[0,∞) is continuous.The associated Green''s function for the above problem and some of its properties are given.Growth conditions are imposed on f which ensure the existence of positives.By using the 5functionals fixed point theorem,the existence of at least 3positive solutions for the the boundary value problem is given.