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

There are two arch enemies Messi and Ronaldo who hate each other to an extreme. One day both were going together and a Jeanie appeared in front of them. Jeanie grants 3 wishes to Ronaldo and one to Messi.

Messi replied smartly 'Give me twice whatever Ronaldo demands'.

Ronaldo asked his 1st wish 'Give me 10000 billion dollars. Soon Messi gets 2000 billion dollars.
Ronaldo asked for his 2nd wish 'Give me one mansion in every country in the world. Soon Messi gets two mansions in every country of the world?

What should be Ronaldo's third wish?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

What part of the chicken has the most feathers?

Can you count the number of squares in the figure below?

Replace the letters of words with a number so that the below equation holds true

BASE +
BALL
---------
GAMES
----------

Can you decipher the two rows to find the hidden word?

With the help clues provided in the image, can you find the 5 digit key?

Why is the longest human nose just 11 inches?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months