Can you make a six-letter word using the letters N, A and B ?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

The answer I give is yes, but what I mean is no. What was the question?

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?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

I always drive my customer away.

Who am I?

Can you find out the remainder when 3^300 is divided by 5?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.