Which is faster, Heat or Cold ? Explain.

There are 3 apples in the basket and you take away 2. How many apples do you have now?

Buy me, smell me or deliver me, I do not change.

Who am I?

The chance of Mr John winning the lottery is 10%. All participants lined up and Mr John is 4th in the row. The first three participants lose the lottery.

What is the chance of Mr John now?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different. How do you measure 45 minutes?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

There is something which you can be arrested for attempting but not for successfully completing.

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?