What does this below rebus puzzle mean?

Find the next number in the series below

21 32 54 87 131 ?

Who always enjoys poor health?

When it's bad luck to meet a black cat?

Two friends were betting. One said to the other, "The coin will be flipped twenty times and each time the coin lands on the head, I will give you $2 and each time it lands on the tale, you will give me $3." After flipping the coin twenty times not a single penny was exchanged among them.

How many times did the coin land on heads?

What do you get if you add 2 to 100 four times?

In a stable, there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable

What does Alexander the Great and Winnie the Pooh have in common?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

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?