What is common among 11, 69, and 88?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

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?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Find the missing number in the image below.

John has eleven friends. He has a bowl containing eleven apples. Now He wants to divide the eleven apples among his friends, in such a way that an apple should remain in his bowl.
How can He do it?

What is the difference between a jeweller and a jailer?

The Little ant seems to be always confused. Do you know why?

What word is identified by the below rebus?

Your Your Your Your Your
Your Your Your Your Your