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

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

1. How can we put an elephant in the refrigerator?
2. How can we put a Giraffe in a refrigerator?
3. The king of the jungle invites all the animals to a party everyone comes except for one animal, which animal?
4. You come to a crocodile-infested lake, you can't go around it, you can't co under it and you can't go over it, how do you get across?

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

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

What will you call your mother's brother's brother-in-law?

How many triangles can you count in the figure given?