Find out the missing number in the picture attached:

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

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

A bomb exploded in a room full of married couples and no one died. How?

There is something which is always coming but never arrives?

Why do we preferably have round manhole covers and not square ones?

What is the below Rebus indicate?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?

A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?