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

What makes this number unique: 8,549,176,320?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

Can you decipher the below rebus?

PBLUESAISNUERSES

Replace the question mark with the correct number below.

Find the missing letter in the last circle logically in the given below picture.

A man has to get a fox, a chicken, and a sack of corn across a river.

He has a rowboat, and it can only carry him and one other thing.
If the fox and the chicken are left together, the fox will eat the chicken.
If the chicken and the corn are left together, the chicken will eat the corn.

How does the man do it?

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