When we see 2 but call 10?

When does a USA Potato change its nationality?

Rearrange the letters in "new door" to make one word.

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

Do you know who was buried in John's tomb?

Buy me, smell me or deliver me, I do not change.

Who am I?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

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

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?

How is the moon similar to a dollar?