Short riddles

The sequence

1 11 21 1211 111221 312211 What is the next number in the sequence?
The next number it: 13112221. Each number describes the previous number. Starting with 1, the second line describes it 11 (one 1). Then the third line describes 11 as 21 (two 1’s). Then the fourth line describes 21 as 1211 (one 2, one 1). This is the pattern.
68.81 %

Difficult pop quiz

A teacher decides to give a pop quiz one day but all of her students refuse to take the quiz thinking that the teacher will call off the quiz. She can give only one of these students a detention for skipping the quiz. All of the students know each other’s names and if a student knows he/she is getting a detention they take the quiz. How can she threaten her students with the single detention so they all take the quiz?
She tells them that she will give the student who skips the quiz whose name comes first alphabetically a detention. This student won’t skip because they know they are getting a detention if they do. The next person alphabetically will then know that they will get a detention so they won’t skip either, and so on.
79.95 %

Who am I?

Alone I am 24th, with a friend I am 20. Another friend and I am unclean. What am I?
The letter 'X'. It is the 24th letter of the alphabet, XX in Roman numerals is 20, and XXX is a label for movies that are very inappropriate (unclean).
68.04 %

I have keys but no locks

I have keys but no locks. I have a space but no room. You can enter, but can’t go outside. What am I? I have a space but no room. You can enter, but can’t go outside. What am I?
A keybord.
66.18 %

Give me food, and I will live

Give me food, and I will live. Give me water, and I will die. What am I?
Fire.
72.58 %

I can only live where there is light

I can only live where there is light, but I die if the light shines on me. What am I?
70.09 %

Summer’s Birthday

Billy was born on December 28th, yet his birthday is always in the summer. How is this possible?
Billy lives in the Southern Hemisphere.
73.45 %

What kind of tree can you carry in your hand?
A palm.
76.66 %

Every night I'm told what to do

Every night I'm told what to do, and each morning I do what i'm told. But I still don't escape your scold.
An alarm clock.
74.16 %