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?

Three friends named Mr. Black, Mr. Yellow and Mr. Green enter a pub on a weekend night. They are wearing either a Black, Yellow or Green shirt.

Mr. Yellow says to them, 'Did you notice that we all are wearing different color shirts than our names?'

To this, the man who was wearing the Green shirt said. 'Wow, thats right.'

Can you identify who is wearing which colour shirt ?

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

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

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

How is this possible?

What question can you never answer yes to?

What is the next number in this series?

4,12,84,3612....

A Man gave one of his sons 10 cents and another son was given 15 cents. What time is it?
Hint: Figure out the relation between time and number, is not so easy..:)