Answer:
Digital white-out.
Forward I am heavy backward I am not. What am I?
I mean goodbye for South Americans.
I have three heads. Cut off one I become stronger. Cut off two I become ten.
I am a word of six; my first three letters refer to an automobile my last three letters refer to a household animal my first four letters is a fish. What am I?
When is it bad luck to see a black cat?