why number 8549176320 is one of a kind?

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?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

Remove two matchsticks to make the below equation correct.

Can you find the odd one out from the below words ?

First Second Third Forth Fifth Sixth Seventh, Eighth Nine Ten Eleven Twelve.

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

John needs to purchase 100 chocolates from three different shops and he has exactly 100 rupees to do that which he must spend entirely. He must buy at least 1 Chocolate from each shop.

The first shop is selling each chocolate at 5 paise, the second is selling at 1 rupee and the third is selling at 5 rupees.

How many chocolates should he buy from each shop?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

What goes through cities and fields, but never moves?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?