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

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

There are forty elephants and they have forty-fore heads. How can this be possible?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

Rahul decided to meet Simran so he boards a local train from Bombay station. Just after the station, there is a 1km long tunnel. The train starts and is now accelerating. Rahul is a claustrophobic guy, so what is the best position for him to sit?

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

A girl was sitting in her hotel room when she heard a knock on the door. She opened the door and found that a man was standing outside.
The man said, "Oh! I am really sorry, I thought this was my room."
He then walked through the corridor to the elevator. The girl did not know the man. She closed her door and called security asking them to apprehend the man.
What made her suspicious of that man? He might have been genuinely mistaken.

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

What is the longest word in the dictionary?