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

People make me, save me, change me, raise me. What am I?

Forwards I am heavy, backward I am not. What am I?

Which country gets ill every time?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Can you make a fire with just a single stick?

What number do you get when you multiply all of the numbers on a telephone's number pad?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

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?