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

A man dies of old age on his 25 birthday. How is this possible?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

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.

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

Spot the cat in the picture below

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?

There was a minor accident with a doctor's son but the doctor noticed no major injury. After the treatment, the father of that doctors son is sitting with the son of the doctor without the doctor being in the room.

How can this be possible?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

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?