What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

Can you figure out the logic I used to decide the order of the following words:
gun, shoe, spree, door, hive, kicks, heaven, gate, line, den

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?

Can you identify if it's a murder or a suicide ?

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

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?