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?

Can you find the 09 errors in the picture below?

ENEMY = 2 * LINK
LINK + 2 = HELL

Then what will be TAXI + HELL? Select from the options below:
a) ROTTEN
b) DANGER
c) HEAVEN
4) MORTAL

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

The dirtier I get, the whiter I look. Who am I?

What is the riddle which can be asked all day with a different correct answer each time.

What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

Who is that with a neck and no head, two arms and no hands? What is it?

Different lights make me strange by changing me into different sizes. What am I?