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

My location can be determined by the below rebus.
So where am i ?

What building has the most stories?

In a family supper, a grandfather, a grandmother, two fathers, two mothers, four children, three grandchildren, one brother, two sisters, two sons, two daughters, one daughter-in-law, and one mother-in-law need to sit at a table.

There are only seven chairs available at the place. How many more chairs do they have to borrow so that everyone can sit down together for the suppers if everybody requires a separate chair?

What does an Island and the letter T have in common?

John leaves home and then he takes three right turns. John wants to return to home but he was scared of Jacob, who is wearing a mask.

What is John Situation ?

Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"

What has a ring but no finger?

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

Can you name some countries which do not have the alphabet 'A' in them?