I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Why is the Hole below a Lock?

What runs around the whole yard without moving?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

Imagine you are in a room with no windows or doors. How will you get out?

Here is a conversation between a couple who both are software professionals.

Husband: Hey! What is your date of birth?
Wife Replied Angrily: It is 591062400
Husband after doing some calculations replied, "Got It".

What is the DOB of the wife?

Can you solve the below tricky visual equation?

Look at the picture and find out which square is not linked with any of the other squares.

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?