How many times in a given day, minutes and hour clock comes in a straight line ?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

I don't get anymore wetter, no matter how much rain falls on me.

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

What is more useful when it is broken?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

With the help clues provided in the image, can you find the 5 digit key?

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

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?