When monkey rotate the gear, which mark will be hit 1 or 2 ?

If eleven plus two equals one, what does nine plus five equal?

Why is a river so rich ?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

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

At a Society election for president, precisely 963 votes were cast.
There is a total of 4 candidates that participate in the election.

The winning candidate exceeds the opponents by 53, 79 and 105 votes.

How many votes do each candidate gets?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

You have $100 with you and you have to buy 100 balls with it. 100 is the exact figure and you can't go below or above the numbers and you have to use the entire $100. If there is no kind of tax applied how many of each of the following balls will you be able to buy:

Green Balls costing $6
Yellow Balls costing $3
Black Balls costing $0.10

Now, how many of each must you buy to fulfil the condition given?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?