It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

What is black when you buy it, red when you use it, and gray when you throw it away?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Can you find the hidden animal in the picture below?

Alex is stranded on an island covered in forest.
One day, when the wind is blowing from the west, lightning strikes the west end of the island and sets fire to the forest. The fire is very violent, burning everything in its path, and without intervention the fire will burn the whole island, killing the man in the process.

There are cliffs around the island, so he cannot jump off.

How can the Alex survive the fire? (There are no buckets or any other means to put out the fire)

What does this rebus puzzle means ?