If you say my name, I will no longer exist. What am I?

During which month do people sleep the least?

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

Can anyone tell me a word in the English dictionary which has a silent 'z'?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

Which is the rope you never skip with?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

Akbar summoned Birbal out of anger.
He told him that he will have to face death.
He asked him to make a statement and if the statement is true he will be buried alive and if the statement is false, he will be thrown at lions.
After hearing Birbal’s statement, Akbar could do nothing but smile.
He gave him 5 gold bars and let him go.

What did Birbal say?

Three people enter a room and have a green or blue hat placed on their heads. They cannot see their own hat but can see the other hats.
The colour of each hat is purely random. They could all be green, blue, or any combination of green and blue.
They need to guess their own hat colour by writing it on a piece of paper, or they can write 'pass'.
They cannot communicate with each other in any way once the game starts. But they can have a strategy meeting before the game.
If at least one of them guesses correctly they win $10,000 each, but if anyone guesses incorrectly they all get nothing.
What is the best strategy?

Find three numbers such that When we multiply three numbers, we will get the prime numbers. The difference between the second and the first number is equal to the third and second.