using four eights (8) and a one (1) and one mathematical symbol , create the number 100

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

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

What is the word or phrase?

You can see three almost identical images below. Can you spot the odd one out from them?

What do you call a fish without an eye?

A boy collects white seashells from the sea and brings them home every night. When he has enough of them, he decides to sell them to a trader.

The trader is ready to buy the shells and he asks the boy about the quantity. At this, the boy starts calculating. He has a giant box that contains 3 mini boxes. Two of them have another mini box inside. If the giant box can hold 50 shells, how many brown shells can he sell to the trader?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?