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

My location can be determined by the below rebus.
So where am i ?

I am a ten letters word
The first four letters have the power to rule,
Next, four-letter can be eaten.
The next three-letter represents a lady.
I can fly as well

what am I looking for?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

How can you make number one disappear by adding something to it?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?

A man is shown a portrait painting. He looks closely, then tells, “Brothers and sisters have I none, but that man’s father is my father’s son!” Who is the man in the portrait?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?