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

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

Can you replace the question mark with the correct number?

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

How can you make a TV, a bed, a dog, and a car liquid?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"