What is both possible and impossible at the same time?

What does this rebus mean?

O
N
C
E
TIME

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

Why is it against the law for a man living in Delhi to be buried in Mumbai?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original 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?

Why do Chinese men eat more rice than Japanese men do ?

I purchased an awesome ice cream cone having 5 different flavour scoops.
Five flavours are pistachio, mint-chip, strawberry, marshmallow, and raspberry

I will give u some clues so that you can figure out the order of flavours from bottom to top.
1. The bottom flavour of the cone has 10 letters.
2. The marshmallow scoop is between the pistachio and the mint-chip scoop.
3. marshmallow is the raspberry scoop but below the mint-chip scoop.

So can you figure out the flavour of ice cream in order from bottom to top?

It is always ahead of me yet I can never see it. What is it?

Can you find out the missing number in the grid?