Answer:
I'm white, I'm round, but not always around. Sometimes you see me, sometimes you don't.
There is an ancient invention. Still used in some parts of the world today. That allows people to see through walls.
Gets rid of bad ones, short and tall. Tightens when used, one size fits all.
Men have one, women two, and when they become family, it’s three. What is it?
I know a word of letters three. Add two, and fewer there will be!
A Chinese, Indian and a Swiss were going to a party. Who is most likely to bring a plus one?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?