It is always ahead of me yet I can never see it. What is it?

Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

Can you count the number of blocks in the picture below?

Remove two matchsticks to make the below equation correct.

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

There was a greenhouse.
Inside the greenhouse, there is a white house.
Inside the white house, there is a red house.
Inside the red house, there are lots of babies.

What is It?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

When I asked a girl's name she told me her name is the date '07/09/2001'.

I thought for a few seconds and then I got her name. Do you?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.