What is the word or phrase?

How can a man go eight days without sleep?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

A mathematics teacher took exams for his students. Out of the total students, 25% passed both the tests included in the exam. However, only 42% were able to clear the first test.

Can you find out the percentage of those students who passed the first test and also passed the second test?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

The answer I give is yes, but what I mean is no. What was the question?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?