I make two people out of one. What am I?

Can you count the number of squares in the figure below?

People put me on the table and cut me but do not eat me. What am I?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

What do you think with the below Picture ?

What English word has three consecutive double letters?

Can you start the fire using two pieces of wood?

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 decipher the following common phrase?

T M C
A U O
H S M
W T E

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?