What has to be broken before you can use it?

A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

If you say my name, I will no longer exist. What am I?

Can you write down eight eights so that they add up to one thousand?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

What you cannot hold but it is yours?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

A family is trapped in a jungle. There is a bridge which can lead them to safety. But at one time, the bridge can only allow two people to pass through. Also, all of them are afraid of the dark and thus, they can't go alone.

Father takes 1 minute to cross, the mother takes 2 minutes, the son takes 4 and the daughter takes 5 minutes. While crossing the time taken will be according to the slower one. How can they all reach the other side in the minimum possible time?

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

The following question it puts forth you:

25 - 55 + (85 + 65) = ?

Then, you are told that even though you might think it's wrong, the correct answer is actually 5!

Whats your reaction to it? How can this be true?