How do you go from 98 to 720 using just one letter?

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

What has 88 keys?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Do You See It?

I inserted a coin in a bottle and closed its mouth with the help of a cork. Now, I was able to take the coin out from the bottle without taking out the cork or breaking the bottle. Can you tell me how I did it?

Can you replace the question mark with the correct number in the below table sequence?

I have no life, but I can die. What am I?

What can you catch but never throw?