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.

If you had an infinite supply of water and 5-quart and 3-quart pails, how would you measure exactly 4 quarts? What is the least number of steps you need?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

Why is the Hole below a Lock?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

In a concert, Christina is performing a dance show with her group.
At 10:00, she and her crew were dancing in an absolutely straight line. At that time Christina was standing in 4th position from both the front and back end of the row.

What was the size of her crew?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

How many letters are in the alphabet?

Can you arrange the six given marbles in a manner that each one of them is touching all four marbles of different colours?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?