What do you answer even though it never asks you questions?

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?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

Paul's height is six feet, he's an assistant at a butcher's shop and wears size 9 shoes. What does he weigh?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

If an electric train is travelling south, then which way is the smoke going?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?