How can you make number one disappear by adding something to it?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

Identify the hidden meaning behind this picture?

What's the best place to go shopping in the ocean?

A king sentenced a man to the death sentence for some crime he had committed. Known for his kindness, the king told the culprit that he had a choice to die in a way he decides.

The culprit was clever and said something that saved him from death. What method do you think he must have chosen for his death?

You see me once in June, twice in November, and not at all in May. What am I?

John was drowned by he was not wet. How?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

I look at you, you look at me, I raise my right, you raise your left. What am I?