You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

John and Jill are madly in love with each other. To remind Jill of his pure love, John wants to send her a ring by post but in their country where burglary is quite prominent, any package that is not locked comes under the risk of being stolen for the contents.

John and Jill possess many padlocks but neither one of them has the other key.

Can you find a way John can send the ring to Jill safely?

A guard is positioned at the one side of the bridge saying ‘A’. His task is to shoot all those who try to leave from ‘A’ to the other side and say ‘B’. He also need to welcome the person who comes from another side ‘B’ to his side ‘A’. The guard comes out of his post every 1 hour and looks down the bridge for any people trying to leave. You are at side ‘A’ and wish to go to another side ‘B’. you also know that it would take 1:45 hr to cross the bridge. How will you cross the bridge?

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

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

What you cannot hold but it is yours?

How can one talk without saying a single word?

In which direction should the missing arrow point?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?