When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

What part of the chicken has the most feathers?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

How many times can you subtract the number two from the number fifty?

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.