Why Aeroplane windows are round?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

A woman shoots her husband.

Then she holds him under water for over 5 minutes.

Finally, she hangs him.

But 5 minutes later they both go out together and enjoy a wonderful dinner together.

How can this be?

Two men are in a desert. They both have packs on. One of the guys is dead. The guy alive has his pack open, and the guy who is dead has his pack closed. What is in the pack?

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

Why do people go to bed?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?