There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

Our product and our sum always give the same answer. Who are we?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

What is red and smells like blue paint?

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.

John was drowned by he was not wet. How?

It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?

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

Can you convert the number zero(0) into a positive number using just one mathematical operator ?