They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

What has one letter and starts with an E?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

Samuel was out for a walk when it started to rain. He did not have an umbrella and he wasn't wearing a hat. His clothes were soaked, yet not a single hair on his head got wet. How could this happen?

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?

What is the end of everything?

What can you see in the middle of March and April that you can never see in any other month?

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?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?