How many times do a clock's hands overlap in a day ?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

Which is the correct shadow of the bird?

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?

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

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

I add 5 to 9 and get 2. The answer is correct, so what am I?

How can you leave a room with two legs and return with six legs?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

Which word does the below Plexor means ?