What has a ring but no finger?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

Replace the question mark with the correct number in below Picture:

Can you solve this picture maths equation?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

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?

Can you divide the below-given shape into four equal and identical pieces?

What happened when the wheel was invented?

The following question it puts forth you:

25 - 55 + (85 + 65) = ?

Then, you are told that even though you might think it's wrong, the correct answer is actually 5!

Whats your reaction to it? How can this be true?