There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).

What is red and smells like blue paint?

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?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

No matter how little or how much you use me, you change me every month. What am I?

What does it mean?

I organized a small get together at my home.
In the party , i have a barrel with some whiskey in it.

Suddenly Guest 1 say 'I bet this barrel of whiskey is more than half full'.
'No, it's less than half full' Guest 2 replied.

I don't have any measuring instrument and without removing whiskey from it , how can i determine which of the guest is right ?

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?