Which country gets ill every time?

What number should come in place of the question mark below?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

How many times can you subtract the number two from the number fifty?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

0 0 0 = 6
1 1 1 = 6
2 2 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

You can use any mathematical symbols in the space provided to make all above algebraic expressions true.

It is an eleven letter word.
The first, second, third and fourth letters form a banquet's name.
The fifth, sixth and seventh letters form a car's name.
The eighth, ninth, tenth and eleventh letters form a mode of transport.

Can you identify what word it is?

What is the word or phrase?

What Does this text mean:

important=important