Can you find out who is the kidnapper in below Picture and why, Explain ?

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

Prove that twice of ten is the same as twice of eleven.

Can you start the fire using two pieces of wood?

If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

A father's child, a mother's child, yet no one's son.

Who am I?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

How can you write nineteen in a manner that if we take out one, it becomes twenty?