What brings you down but never up?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

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?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

Can you count the number of squares in the figure below?

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.