Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

I have teeth but i don't bite. Who Am I ?

I am an odd number. Take away a letter and I become even. What number am I?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

What can go up a chimney down, but can’t go down a chimney up?

A beggar on the street can make one cigarette out of every 6 cigarette butts he finds. After one whole day of searching and checking public ashtrays the beggar finds a total of 72 cigarette butts. How many cigarettes can he make and smoke from the butts he found?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

It begins where the time ends.
Its second is an expression of surprise.
Its third is a question.
Its fourth is urinate.
It ends with a drink.

Which country it is?