Answer:
What word becomes shorter when you add two letters to it?
There is an ancient invention still used in some parts of the world today that allows people to see through walls. What is it?
I can be as thin as a picture frame but my insides have many things you can see.
What must be looked through in order to see?
If you have me, you want to tell me. If you tell me, you don't have me.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?