  Let $X_\lambda$ and $X_\lambda'$ be monomial deformations of two Delsarte
hypersurfaces in weighted projective spaces. In this paper we give a sufficient
condition so that their zeta functions have a common factor. This generalises
results by Doran, Kelly, Salerno, Sperber, Voight and Whitcher
[arXiv:1612.09249], where they showed this for a particular monomial
deformation of a Calabi-Yau invertible polynomial. It turns out that our factor
can be of higher degree than the factor found in [arXiv:1612.09249].

Number Theory;Algebraic Geometry