What four weights can be used to balance from 1 to 30 pounds?

A wealthy man lives alone in a small cottage. Being partially handicapped he had everything delivered to his cottage. The mailman was delivering a letter one Thursday when he noticed that the front door was ajar. Through the opening he could see the man's body lying in a pool of dried blood. When a police officer arrived he surveyed the scene. On the porch were two bottles of warm milk, Monday's newspaper, a catalog, flyers, and unopened mail. The police officer suspects it was foul play. Who does he suspect and why?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Can you solve below mathematical equation?

2^1234 - 2^1233

At a party, there are five people and a whole round cake lying at the centre of the table. Only four people will make a cut and take their piece and the last one will get the remaining piece on the table. How can they make sure that everyone gets a 1/5th of the piece?

You are a thief and you are being punished for your crime. People have tied your head down on a tree with a rope that has been anchored in the ground. A candle is burning below the rope which is slowly burning it away. Just below your head, a Lion has been left loose and is waiting for you to drop down on the ground so he can have you as his lunch.

You have to survive the scenario. How will you do it?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

What is full of holes but still holds water?

What is the last thing you take off before bed?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?