What is the next number in this matchsticks series riddle?

What has one letter and starts with an E?

What part of Turkey has the most feathers?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

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?

A man is walking down a road with a basket of eggs. As he
is walking he meets someone who buys one-half of his eggs
plus one-half of an egg.
He walks a little further and meets another person who buys
one-half of his eggs plus one-half of an egg.
After proceeding further he meets another person who buys
one-half of his eggs plus one half an egg. At this point, he
has sold all of his eggs, and he never broke an egg.
How many eggs did the man have to start with?

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?

A sundial has the fewest moving parts of any timepiece. Which has the most?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?