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

If all the below statements are true

1. Gianni was either in Italy or France in 1997.
2. If Gianni did not kill Versace, Hilton must have killed him.
3. If Versace died of suffocation, then either Gianni killed him or Versace committed suicide.
4. If Gianni was in Italy in 1997, then Gianni did not kill Versace.
5. Versace died of suffocation, but he did not kill himself.

Who killed Versace and where was Gianni in 1997?

What word begins and ends with an E, but has only one letter?

Who has married many women but was never married?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

Anabelle is a clever trader of rare artefacts. Each day she carries three boxes each filled with thirty artifacts. The boxes can't hold more than that. She travels far in northern lands to sell these artefacts but on the way, she comes across thirty checkpoints where she has to shed one of the artefacts for each sack to the authorities for letting her pass.

How many artifacts will be left with her when she reaches her destination crossing all the checkpoints?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

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

Can you find the thief by just looking at the picture below?