Question

A bulb is rated at 330v-110v. what do you think is it resistance?

Answer 1

I think u have written the values wrong it must be 330W-110V.
then as P=V^2/R
so we get R=V^2/P
 on putting values we get 
  R=36.7 ohm

Answer 2

It can't be 330V as well as 110V.
Both are Voltages.
One should be something else.