Why do people go to bed?

A few friends are enjoying their sea voyage in a boat full of apples. On the way, they felt hungry and thus decided to eat the apples. Together, they ate two dozen of apples. When they have eaten the apples, will there be any change in the water level?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

Rearrange the letters in "new door" to make one word.

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

What is the riddle which can be asked all day with a different correct answer each time.

There is a jar in which there are two types of candies.
20 blueberries and 16 strawberries. You perform the following steps:
1) You take out two candies.
2) If the two candies are of the same flavour, you add a blueberry one otherwise, you add the strawberry one.

You repeat these two steps till there is just one candy remaining in the jar. Which flavoured candy will be left?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?