In which direction should the missing arrow point?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

There is a straight highway. Four different villages lie on that highway. The distance between them is different. The third village is 60km away from the first village; the fourth is 40 km away from the second; the third is 10 km near to the fourth that it is to the second.

Can you calculate the distance between the fourth and the first village ?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

The centre of the third figure is empty. What digit should fit inside?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

When it's bad luck to meet a black cat?

What you cannot hold but it is yours?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?