What happened when the wheel was invented?

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

Consider this: Arnold Schwarzenegger has a big one. Michael J. Fox has a small one. Prince doesn’t have one. The Pope has one but never uses it. Bill Clinton has one and uses it all the time. What is it?

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

Can you count the number of triangles in the given figure?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

Keyboard words are not in alphabetical order, Why?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.