finding difficulty in solving maths. Is there any online teacher to teach only maths for GRE.Or is there any private tutor for maths.

well you have two options, either join a good coaching institute for GRE preparation like TIME, Jamboree etc or prepare on your own. For self-preparation, I would suggest that you start doing RS Agarwal fro Quants which is the most basic book and will help you gain a firm grip on concepts. After doi

The Quantitative Aptitude for GRE should be tried by your self , You should First try the solved Examples to understand the problem solving techniques , then you can add Time Constrain Its a Gradual process before looking for tutor You should Make your self Comfortable first