You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

John was piloting a plane behind a car but was never able to overtake it. Why?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

If,

A = 1

B = 2

C = 3

...

...

Z = 26.

Based on above rule, you need to find an eleven letter word whose letter sum is equal to 52.

It is an eleven letter word.
The first, second, third and fourth letters form a banquet's name.
The fifth, sixth and seventh letters form a car's name.
The eighth, ninth, tenth and eleventh letters form a mode of transport.

Can you identify what word it is?

During which month do people sleep the least?

I am white when I am dirty, and black when I am clean. What am I?