When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

Can you count the number of blocks in the picture below?

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

A newspaper is supposed to have 60 pages, but pages 24 and 41 are missing.
Which other pages won't be there?

I have feet, but no legs. Which animal Am I?

Can it be possible to build a house that has all its four walls facing towards the South?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?