Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

What has one eye, but can’t see?

With the help clues provided in the image, can you find the 5 digit key?

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

Imagine you are in a room with no windows or doors. How will you get out?

How many times in a given day, minutes and hour clock comes in a straight line ?

A kind heart person buy packed food at 3$/packet from United states and sells them at 1$/packet at Africa. After some time he becomes a millionaire.

How come the guy become millionaire ?

What word is pronounced the same if you take away four of its five letters?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.