I’m tall when I’m young, and I’m short when I’m old. What am I?

Two trains start at the same time, one from Bangalore to Mysore and the other from Mysore to Bangalore. if they arrive at their destinations one hour and four hours respectively after passing one another, how much faster is one train running than the other?

Find the hidden panda in the image below.

What demands an answer, but asks no questions

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?

Why is the longest human nose just 11 inches?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?