Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Check out the number list below and find what number comes next in the sequence.

111 , 113 , 117 , 119 , 123 , 137 , ?

Remove two matchsticks to make the below equation correct.

When monkey rotate the gear, which mark will be hit 1 or 2 ?

O_er_t_o_

Complete the missing letters of the given word.

Why is a river so rich ?

What is so fragile that saying its name breaks it?

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?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

4 fathers, 2 grand-fathers and 4 sons went to watch the movie.What is the minimum number of tickets they need to buy ?