What is the centre of gravity?

Can you name an animal whose killing cannot be performed without spilling your own blood?

Why did Navjot Singh Sidhu put the new January calendar in the freezer

What does the below mathematical rebus mean?

A sea diver is a real show-off. He showed everyone that he can hold his breath underwater for 15 minutes.

I went to the diver and told him that I can be underwater for double the time i.e 30 minutes.
He responded that he will give me 100$ if I would be able to do it. I won 100$.

What did I do?

Why blonde cannot dial 911?

What does Alexander the Great and Winnie the Pooh have in common?

Why Wine Glass Stem is so long?

What do you think with the below Picture ?

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