What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

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?

Below rebus represent famous DiCaprio movie. Can you name it?

What English word has three consecutive double letters?

Why do people go to bed?

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves into five teams with seven members each, forming five rows.

How did they manage to achieve this formation?

Who is that with a neck and no head, two arms and no hands? What is it?

How can a man go eight days without sleep?

What can go through glass without breaking it?

A sundial has the fewest moving parts of any timepiece. Which has the most?