what's the probability of getting a king or a queen from a pack of 52 cards?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

Why Aeroplane windows are round?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

What has a ring but no finger?

Find the next number in the sequence

5 12 24 36 ?

Why is 6 afraid of 7?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

A guard is positioned at the one side of the bridge saying ‘A’. His task is to shoot all those who try to leave from ‘A’ to the other side and say ‘B’. He also need to welcome the person who comes from another side ‘B’ to his side ‘A’. The guard comes out of his post every 1 hour and looks down the bridge for any people trying to leave. You are at side ‘A’ and wish to go to another side ‘B’. you also know that it would take 1:45 hr to cross the bridge. How will you cross the bridge?