What work can one never finish?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

Today is John's birthday.
A year ago, John had five candles and he lit all the candles except the one at the last.
Now he is going to light all the candles.

How old is John Today?

(He is not five today.....)

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 ?

Prove that twice of ten is the same as twice of eleven.

Count the number of triangles in the given picture.

My location can be determined by the below rebus.
So where am i ?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

There are forty elephants and they have forty-fore heads. How can this be possible?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?