When it's bad luck to meet a black cat?

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?

John speaks the truth only once a day in a week. Below are a few hints for you:

First: Days are Sunday, Monday and so on.
Second: One day he says, "I lie on Monday and Tuesday".
Third: On the next day, he says, "Today is either Thursday, Saturday or Sunday".
Fourth: On the next day, he says, "I lie on Wednesday and Friday".

Can you identify the day on which he speaks the truth?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

How many sides does a circle have?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

There are three houses in a straight row. One is red, one is blue, and one is white. The red house is left of the middle. The blue house is right of the middle. Where's the white house?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?