How can one talk without saying a single word?

Can you spot the man between the coffee bean in the picture below ?

Can you find out the number that should replace the question mark with a valid reason?

Count the number of squares in the picture below.

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

What does this rebus puzzle means ?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

A Shopkeeper sold a few chickens to four different customers on a particular day. It was such that each customer purchased half of the remaining chickens and half the chicken more.

Can you find out how many chicken were sold by the shopkeeper on that day if we tell you that the fourth customer bought a single chicken ?

A lion and its tamer are standing inside a cage that measures 1 unit in radius. Both of them can effortlessly run at the speed of 1 unit maximum.

1) Suppose the lion is hungry, will he be able to eat up the tamer?
2) If yes, how long can the tamer survive?