I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

There was a strange boy who was born before his father. How can this be possible?

The Little ant seems to be always confused. Do you know why?

What can you hold in your right hand, but never in your left hand?

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

I have branches, but no fruit, trunk or leaves. What am I?

10+10 and 11+11 can give you the same answer.

Explain how?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?