Who makes a better math tutor, a man or a woman?

It is NOT a gender thing.  It depends totally on the person.  Sometimes a man; sometimes a woman.

There are probably MORE male maths tutors on the market, but there is no reason why any of them should automatically be any "better" than a woman.

You can have great tutors of both and horrible tutors of both. Being male or female doesn't make you a better tutor.

Parents in my country prefer female tutors. however, in my college last time, almost all the math professors were males.