What word begins and ends with an E, but has only one letter?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

Wednesday, Steve and Pam go to a restaurant to eat lunch. After eating lunch, they pay the bill. But Steve and Pam do not pay the bill. So…who does?

You are playing as white and given four rooks to checkmate the black king in four moves with the following rules 1. You can place one rook every move and ensure the black king should be in check position.2. After four moves the black king should be in the checkmate position.

I always drive my customer away.

Who am I?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

A little girl goes to the store and buys one dozen eggs. As she is going home, all but three break. How many eggs are left unbroken?

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