Complete the table series riddle by finding the number that can replace "??".

What is the coolest letter in the alphabet?

On a windy rainy night , I was driving in my car.
When i reach the bus stand , i see three people waiting for the bus.

1. An old lady who needs an immediate medical attention
2. My Best Friend
3. Girl whom i love from childhood

My car is a two seat, so can you tell me , what i have done in this situation ?

What type of tree can I carry in my hand?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

Can you name an animal whose killing cannot be performed without spilling your own blood?

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?

What has one letter and starts with an E?

Spot 5 differences in two Christmas tree below:

A sea diver is a real show-off. He showed everyone that he can hold his breath underwater for 15 minutes.

I went to the diver and told him that I can be underwater for double the time i.e 30 minutes.
He responded that he will give me 100$ if I would be able to do it. I won 100$.

What did I do?