It is definitely a debatable topic as to whether a woman can marry a younger man or not as different people will have differences in their opinions on this topic.
In my opinion,a woman can surely marry a younger man and age should not be a parameter to decide whether the marriage would be successful or not.Compatibility matters a lot and if the two people feel that they are well suited to each other,then the woman being elder to the male should not be a reason good enough to stop them from tying the sacred knot.Just a one or two year age difference can easily go unnoticed.What really matters is that they share love and an understanding and feel that they can spend their life together.A small age difference should not be given that much importance and people should consider more important factors in their marriage.
Rest is to be left for GOD to decide.