I am 5 letters long.
My first two tell you who I am
My first 3 could be a medicine
My last three reversed could be a young boy.
My 4th, 3rd and 2nd in that order could be a fruit drink.
If you have me you may hang me round your neck
WHAT AM I ?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

What word does this rebus represent?

meta meta
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Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

Can you replace the question mark with the correct number?

Prove that twice of ten is the same as twice of eleven.

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.

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

Can you count the number of triangles in the given figure?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?