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?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

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

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

What is the centre of gravity?

Which city is three-fifths chick two third cat and 50% goat?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

What has one eye, but can’t see?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

What is the fastest way to double your money?