What is the next number in this matchsticks series riddle?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

What kind of band never plays music?

In order to complete the racing competition, the Mexico racetrack has to submit its top and the most famous three horses to win the competition. Due to an electrical storm, all the records are cleared and no one knows which horse holds the record. They all look identical and it becomes even more difficult to differentiate the horses. There are 25 horses in the Mexico racetrack. But there can be only five horses at a time on the track. What will the least number of races that can be conducted to find out the three fastest horses?

How many times can you subtract the number two from the number fifty?

O_er_t_o_

Complete the missing letters of the given word.

Can you count the number of triangles in the picture below?

This was asked in an interview with Coa-Cola.

The interviewer has given me 100 marbles(50 white and 50 black) and two empty boxes.
He then told me that he will leave the room and i need to place all the marbles in two boxes.

And When he come back, he will draw a marble from any of the two box and if the marble is white I will be hired.

Also
* No box can be empty.
* All 100 marbles must be placed in one of the two boxes.

So what should I have done?

Can you start the fire using two pieces of wood?