You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

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?

Why is a river so rich ?

John was running from 40 thieves. John has got 3 gold boxes which weigh as 4kg, 2kg, and 1kg respectively. A witty man asked John to stay with him for seven days in exchange for 1kg gold per day. John needs to stay there for seven days and also do not want to give the witty man any advance. How can John pay for his seven days stay?

I always drive my customer away.

Who am I?

Paul's height is six feet, he's an assistant at a butcher's shop and wears size 9 shoes. What does he weigh?

When it's bad luck to meet a black cat?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

Before Mount Everest was discovered, what was the highest mountain in the world?

What do you call a fish without an eye?