How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

We have arranged an array of numbers below. What you have to do is use any kind of mathematical symbol you know excluding any symbol that contains a number like cube root. You can use any amount of symbols but you have to come up with a valid equation for all of them.

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

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

Which country gets ill every time?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

They are three errirs in this question. Can you find them?

Can you find out which options fits best with the missing column?

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?