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?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

What is the fastest way to double your money?

In a basket of apples,
when counted in twos, there was one extra
when counted in threes, there were two extra when counted in fours, there were three extra
when counted in fives, there were four extra
when counted in sixes, there was five extra.

However, if the apples were counted in sevens, no extra apple was left. Can you calculate the minimum number of apples that were present in the basket?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

Why do people go to bed?

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.

How old is your son? asked a man to his neighbour. My son is five times as old as my daughter and my wife is five times as old as my son. I am twice as old as my wife whereas my grandmother, who is celebrating her eighty-first birthday is as old as all of us put together.

How old is the man's son ?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

What demands an answer, but asks no questions