There was a strange boy who was born before his father. How can this be possible?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

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

Who am I?

Why is Saturday stronger than Monday?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

Count the number of balls in picture below:

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?