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 can a man go eight days without sleep?

Rearrange the letters in "new door" to make one word.

I know a nine-letter word having only one vowel.
Do you ?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

Can you find the hidden animal in the picture below?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

I ask Joseph to pick any 5 cards out of a deck with no Jokers.

He can inspect then shuffle the deck before picking any five cards. He picks out 5 cards then hands them to me (Jack can't see any of this). I look at the cards and I pick 1 card out and give it back to Joseph. I then arrange the other four cards in a special way, and give those 4 cards all face down, and in a neat pile, to Jack.

Jack looks at the 4 cards i gave him, and says out loud which card Joseph is holding (suit and number). How?

The solution uses pure logic, not sleight of hand. All Jack needs to know is the order of the cards and what is on their face, nothing more.

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?