What brings you down but never up?

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?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

An ant is travelling on a 1-meter-long rope at 1 cm/second but also the entire rope is being stretched by an extra 1 meter/second. Is it possible for the ant to reach at the end of the rope?

The following four words might seem abrupt to you. But you can make them meaningful by just adding vowels.
RDSH
GGPLNT
TMT
NN

Hint: All of them are vegetables.

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

I have an eye but still cannot see.

Who am I?

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.

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?