How can you make number one disappear by adding something to it?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

A container contains 100 eggs. They can be either fresh or rotten. What is sure is the fact that there is at least one fresh egg in that container.

If you are asked to pick two eggs randomly from the container, at least one of them will be rotten.

Can you calculate how many eggs in that container are fresh?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

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

A boy purchased a book from a bookkeeper and gave him $100.
The cost of the book is $50 but the bookkeeper has no change, so he gets the change from the next shop and returns the boy his $50.

After some time the next shopkeeper came with the $100 note and told the bookkeeper that the note was a fraud, so he took the money back.

How much loss did the bookkeeper face?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

'Ferrari driver' easily beats the 'force driver' in a two-car race. How did Indian newspapers truthfully report so to look as a 'force drive' had outdone the 'Ferrari driver'? Think!!!

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?