If a wheel has 54 spokes, how many spaces are there between the spokes?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

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

What has 88 keys?

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

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?

What is the next number in this matchsticks series riddle?

If 21x = 79x, what is the value of x?

Can you name some countries which do not have the alphabet 'A' in them?

Can you guess the name of the month by looking the below rebus ?