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

Who can jump higher than a Mountain?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

Which is the correct shadow of the bird?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

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 discover the missing number in this series?

37, 10, 82
29, 11, 47
96, 15, 87
42, ?, 15

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?