It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Which is the rope you never skip with?

John gave half of the apples he had plus one more to Jacob. He gave half of the remaining ones plus one more to James. Now, John was left with just one apple.

Can you find out how many did he have in the beginning?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

What always comes into a house through the keyhole?

How many times in a given day, minutes and hour clock comes in a straight line ?

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 city is three-fifths chick two third cat and 50% goat?

Can you find a number that lies one third of the distance between 1/3 and 2/3?