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?

If an electric train is travelling south, then which way is the smoke going?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

Six people park their car in an underground parking of a store. The store has six floors in all. Each one of them goes to a different floor. Simon stays in the lift for the longest. Sia gets out before Peter but after Tracy. The first one to get out is Harold. Debra leaves after Tracy who gets out on the third floor.

Can you find out who leaves the lift on which floor?

There are three houses in a straight row. One is red, one is blue, and one is white. The red house is left of the middle. The blue house is right of the middle. Where's the white house?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

How can you take 2 from 5 and leave 4?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?