What has many keys but can’t open a single lock?

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

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?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

There are forty elephants and they have forty-fore heads. How can this be possible?

In the picture given below, can you find out which digit will take place of the question mark?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

If your uncle’s sister is not your aunt, what relation is she to you?

Why 1729 is a magic number? Answer Logically.

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?