You are distributing vegetable oil. There are 21 bottles in total out of which 7 are full, 7 half empty and 7 empty. The oils has to be distributed among three people.
How will you distribute so that each person gets equal number of bottles and the same quantity of oil?
First Person: 3 full bottles, 1 half empty bottle and 3 empty bottles.
Second Person: 3 full bottles, 1 half empty bottle and 3 empty bottles.
Third Person: 1 full bottle, 5 half empty bottles and 1 empty bottle.
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?