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

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

Which word does the below Plexor means ?

What's the only room from which no one can enter or leave

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

On a charity event in Russia, Murray beat Djokovic by winning six games and losing three games.
Note: There is a total of 5 service breaks(one who serve lost the game).
Who served first, Djokovic or Murray?

Can you place three balls such that the equation shown in the picture holds true?

If six children and two dogs were under an umbrella, how come none of them got wet?