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 ?

Why do Chinese men eat more rice than Japanese men do ?

What always comes into a house through the keyhole?

A sundial has the fewest moving parts of any timepiece. Which has the most?

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

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

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

what's the probability of getting a king or a queen from a pack of 52 cards?

How many letters are in the alphabet?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?