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

After teaching his class all about Roman numerals (X = 10, IX=9 and so on) the teacher asked his class to draw a single continuous line and turn IX into 6. The teacher's only stipulation was that the pen could not be lifted from the paper until the line was complete.

A woman named Maria was at the funeral of her mother. She met a nice young man that she had never seen before and after the service, they spent a bit of time together. Then she got busy and didn’t get his name or phone number before he left. She tried to find him, but no one knew who he was or how to contact him. A few weeks later, Maria’s older sister dies and the police suspect murder. Who killed the sister?

Decode below three cipher riddles:

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

Take one out and scratch my head, I am now black but once was red. What am I?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

Can you count the number of matches in the picture below ?

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

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?